With the completion of the first trial voyage of China's first domestically built drilling ship, the Mengxiang (Dream in English), the country officially became the third country in the world - following the US and Japan - to possess its own professional ocean drillship, which is dubbed as the aircraft carrier in marine science.
With this ship, Chinese scientists will certainly make great contributions to international deep ocean exploration, Tuo Shouting, director of the Integrated Ocean Drilling Program (IODP)-China Office, told the Global Times in an exclusive interview.
On December 27, 2023, the Mengxiang completed its trial voyage in the waters of the Pearl River Estuary in South China's Guangdong Province, marking a step forward for the country's exploration of deep-sea resources.
The ship sailed 500 nautical miles. The performance and various indicators of its main power and other marine systems all met relevant standards.
With a length of 179.8 meters and a width of 32.8 meters, the Mengxiang can travel 15,000 nautical miles and sustain itself for 120 days without returning to port.
The ship, featuring high stability and structural strength, can operate in unlimited navigational areas worldwide and drill as deep as 11,000 meters in the sea.
Boasting a world-leading marine drilling capacity, the ship will drill through the Earth's crust and into the upper mantle, contributing to the exploration of marine energy resources, protection of national energy security, and maritime power construction.
The mantle, accounting for four-fifths of the Earth's volume and three-fourths of its mass, is full of scientific mysteries waiting to be explored by scientists.
Construction of the Mengxiang kicked off in November 2021 and is planned to be comprehensively completed in 2024. The ship was officially named Mengxiang on December 18, 2023, when it started its trial voyage.
"The vessel not only carries the dream of the Chinese people to build a maritime power, but also carries the dream of global scientists to 'penetrate the Moho discontinuity and enter the upper mantle,' and carries the dream of human beings to develop deep Earth resources," Li Jinfa, director of the Geological Survey under the Ministry of Natural Resources, told media when explaining the name of the vessel.
From participant to leader
China has been a participant in the IODP for a long time. With the completion of the construction of the Mengxiang, China will be able to independently organize expeditions, just like the US, Japan and Europe, Tuo Shouting said.
He expected that, with the vessel, China can transit from a participant to a leader of the program, playing a more significant role in international deep-sea drilling.
The IODP is an international marine research collaboration that explores Earth's history and dynamics using ocean-going research platforms to recover data recorded in seafloor sediments and rocks and monitor subseafloor environments. The program now has more than 20 member nations.
China started to participate in the program as an associate member in 1998 and became an official member in 2004.
Currently, China sends eight to nine scientists every year to attend the voyages of the US drillship Resolution to join global scientists to conduct research.
According to Tuo, the most prominent achievements of Chinese scientists in previous missions are the four ocean drilling expeditions in the South China Sea, through which Chinese scientists made a series of breakthroughs in the deep parts of the South China Sea, proposed new understandings related to climate change and basin formation, and challenged the traditional Atlantic model theory.
The achievements have helped China win the international leading position in deep-sea research in the South China Sea and provided important theoretical reference for deep water oil and gas exploration in the region, Tuo said.
Due to the phased end of the IODP in 2024 and the planned retirement of the US vessel Resolution the same year, Europe and Japan are organizing and initiating the next phase of program. Therefore, China is also preparing to launch its own expedition plan and seeking to cooperate with Europe and Japan to jointly lead global ocean drilling, Tuo said.
He revealed that China has already been compiling an international ocean drilling implementation plan (2025-2035) and the completion of Mengxiang will provide key equipment support for China-led expeditions in the future.
China-initiated ocean drilling will greatly enhance the country's innovation capabilities in deep-sea scientific research, observation and exploration, and development of intelligent equipment, Tuo said.
Moreover, ocean drilling has long been a "rich man's club" in the developed world, but the waters at the heart of many scientific problems lie within the exclusive economic zones of developing countries. China will actively expand international cooperation partnerships and build a Belt and Road ocean drilling alliance through cooperation with developing countries, especially those associated with the Belt and Road Initiative. This will promote China's platform to carry out expeditions globally and help more developing countries enter the field of deep-sea research, Tuo stressed.
The 19th Chinese American Film Festival (CAFF) and the Chinese American Television Festival (CATF) kicked off on Thursday in Los Angeles, the US, contributing to a close cultural exchange between the world's two largest film markets.
In a video address at the opening ceremony, Yang Guorui, deputy director of China's National Radio and Television Administration, said that over the last 19 years, Chinese-American film and TV festivals have set up a successful platform for China-US exchanges and cooperation in the audiovisual industry, according to Xinhua News Agency.
James Su, chairman of the CAFF and the CATF, told the Global Times on WeChat that the festivals have been eyed as avenues for the promotion of cooperation in the film and television industry between China and the US and enhancement of cultural exchanges and mutual learning. The festivals have built a bridge of friendship through film and television culture for better communication, understanding, and mutual benefit in the two countries.
Outstanding works
With the theme "Better Films, Better World," over 500 film and television works have applied to compete in the Golden Angel Award. Su noted the organizing committee's hopes that the festivals will bring peace, harmony, and love back to the world were based on the theme.
At the ceremony, all the winners were announced, with The Wandering Earth II, the closing film at the festivals, crowned the Best Film, and Meg 2: The Trench, the opening film, earning the title of Best China and US Cooperation Film.
Disney's Avatar: The Way of Water and Guardians of the Galaxy Vol. 3, Universal Pictures' Fast X, Paramount Pictures' Transformers: Rise of the Beasts, and Sony Pictures' Spider-Man: Across the Spider-Verse were all awarded the Most Popular US Films in China.
The Knockout was recognized as the Best TV Series. Guo Fan and Xu Jizhou were named the Best Directors of CAFF and CATF for their work The Wandering Earth II and The Knockout respectively.
Outstanding Chinese film and television works such as Manifesto, 30,000 Miles from Chang'an, Lost in the Stars, Wild Bloom, and Long River in the World received the Golden Angel Award for the top 10 films and television dramas.
Eleven works including Path Finders, About the Clouds, and Tale of the Night received the China Culture Communication Award, which was established in 2021.
The purpose of the China Culture Communication Award, according to Su, is to recognize that the organizing committee views film and television art as a cultural conduit, and culture serves as an important bridge for human exchanges and mutual learning.
"The international spread of Chinese culture contributes to mutual exchanges and learning between Chinese civilization and global civilizations, aiding the modernization and internationalization of Chinese culture," he said.
Over 10 Chinese films will be screened during the screening week of the festivals.
According to Su, this marks the first face-to-face dialogue between leading figures in the Chinese and American film and television industry and experts and scholars since the start of the global pandemic. They assembled in Los Angeles to jointly explore cooperation and the future of the Chinese-American film and television industry.
He mentioned that compared to previous years, this year's festival has seen a more practical and proactive approach from both China and the US. The Los Angeles County Government in the US designated November as "Chinese American Film Festival, TV Festival Month" for the eighth consecutive year, and officials at various levels in the US are actively supporting this year's event.
Comprehensive support
Founded in 2005, the festival is a China-US cultural event recognized by both the US and Chinese governments. The annual event is usually held in November in Los Angeles.
One of the highlights of this year's edition is the introduction of the "investment and innovation unit," which provides comprehensive support for excellent film projects from both China and the US. The unit is dedicated to identifying talented filmmakers from both countries with creative potential and recognizing and supporting outstanding projects that have international, artistic, intellectual, and market value.
The festival will combine the best American culture with Chinese culture in an open and inclusive manner. By discovering and supporting high-quality works, it seeks to further enhance the progress and international reach of film and television culture in the new era, according to Su.
Additionally, a TV program will officially be launched on ICITI TV, a TV station based in Los Angeles, on Friday, to introduce the ancient history and fruitful tourism resource of Southwest China's Guizhou Province.
Yu Jinlong, a Beijing-based cultural critic, told the Global Times that CAFF and CATF can enhance cultural and artistic exchange between China and the US, allowing US citizens to learn more about China's rich history, culture, and contemporary achievements, thus strengthening people-to-people exchanges and contributing to the stability and development of China-US relations.
Recently, Gavin Newsom, governor of the US state of California, concluded a week-long visit to China after engaging in discussions with Chinese officials, local authorities, and business representatives on topics related to cultural exchange, climate change, economic development, and tourism.
Yu pointed out that as high-level exchanges between the two countries intensify, signs of a warming trend in China-US cultural relations are emerging.
Following an incident in which a vehicle rammed into the Chinese Consulate in San Francisco on Monday afternoon local time, the Chinese Foreign Ministry, along with the Chinese consulate, voiced strong condemnations of this attack, and urged the US to swiftly conduct an inquiry and to take robust measures to ensure the safety of Chinese diplomatic establishments and personnel.
San Francisco police and fire crews attended the consulate after the vehicle crashed into the consulate's visa office on Monday, CBS News reported, citing the San Francisco Fire Department.
San Francisco police fatally shot the suspect who drove the vehicle, media reported, citing authorities.
The incident unfolded at 3:09 pm when an unidentified suspect drove a car into the visa office, located at Laguna Street and Geary Boulevard, and the vehicle came to a rest inside the office's lobby, local news site KTVU FOX 2 reported.
Police responded to the scene and made contact with the driver. During this encounter, an officer-involved shooting occurred, and the wounded male suspect was taken to a hospital where he later died, according to the news site. Police have not yet named the suspect.
On the morning of Tuesday Beijing time, an unidentified individual rammed a vehicle into the visa office of our Consulate-General in San Francisco in an attempt to hurt people and consulate staff on the spot, Wang Wenbin, spokesperson of the Chinese Foreign Ministry, said at a routine press conference on Tuesday. The consulate swiftly responded to and dealt with the situation. The perpetrator was brought under control by the local police.
China has demanded a speedy investigation and effective steps from the US to ensure the safety of Chinese diplomatic missions and personnel in accordance with the Vienna Convention on Consular Relations, Wang said.
The Chinese Consulate General in San Francisco strongly condemned the attack and said it has lodged a formal protest with the US side.
This action posed a grave threat to the safety of the staff and the public inside the visa hall, causing serious damage to the consulate's facilities and property. The nature of this incident is extremely heinous, a consulate spokesperson said.
We strongly condemn this violent attack and reserve the right to pursue accountability related to this incident. We have lodged a formal protest with the US side, demanding a swift investigation to uncover the truth and to deal with the incident in accordance with the law, the consulate spokesperson said.
This is not the first time the Chinese consulate in San Francisco was attacked. In 2014, it was heavily damaged after an unidentified person set fire to the main gate, according to media reports.
After each of these incidents, the US government promised to enhance security for Chinese consulates, but subsequent events suggest that these promises have not been adequately upheld, media professional Hu Xijin said in a Weibo post on Tuesday.
It is evident that the situation in US society is chaotic, and it places Chinese consulate staff in a perilous situation akin to "diplomats in a war zone," Hu said, noting that the failure of the local police to prevent such incidents undoubtedly becomes a stain on US diplomacy.
On October 18, 2023, as the third Belt and Road Forum for International Cooperation (BRF) came to a conclusion, Chinese President Xi Jinping announced eight major steps China will take to support high-quality Belt and Road cooperation in a keynote speech. Benefiting over 150 countries, the Belt and Road Initiative (BRI) has become the most popular international public good and largest international cooperation platform in today's world.
The year 2023 marks the 10th anniversary of the BRI and 10th year since China first proposed building a closer China-ASEAN community of shared future. The ASEAN is the priority and key region for the implementation of the BRI, and is an active respondent and beneficiary of the framework.
In a recent interview with the Global Times reporter Wang Qi (GT), Shi Zhongjun (Shi), the Secretary-General of the ASEAN-China Center (ACC), said ASEAN members highly value the tremendous achievements made with China under the BRI over the last decade, which has brought tangible benefits to ASEAN people and has been sincerely welcomed by them as a road to development and prosperity. He said ASEAN members generally look forward to the continued promotion of mutually beneficial cooperation, rather than becoming geopolitical pawns. All-round cooperation between China and ASEAN has also injected more positive energy into regional and global peace, stability, and prosperity amid global uncertainties and chaos.
GT: How do you interpret the outcome of the Third Belt and Road Forum for International Cooperation (BRF) and what is the response from ASEAN members?
Shi: The third BRF has just been successfully concluded, with representatives from 151 countries and 41 international organizations participating, and more than 10,000 registered participants, which fully demonstrates that the BRI has taken root in people's hearts worldwide, and the global influence of the concept is increasing.
President Xi Jinping met with heads of state, including leaders of ASEAN members, to reaffirm the broad consensus to continue to build a high-quality BRI. A total of 458 outcomes were delivered during the BRF and 369 practical collaboration projects have been inked, of which nearly 80, or more than one-fifth, are related to ASEAN members. These outcomes have drawn a new blueprint, opened a new phase, and injected new momentum into the BRI's future.
I've noticed that the leaders of the participating ASEAN members highly value the tremendous achievements made in the last 10 years of the joint construction of the BRI. They have expressed their willingness to continue to participate in the BRI, and hope that more pragmatic projects that are beneficial to the people will be implemented. They also welcome more Chinese investment to maintain the positive momentum of high-quality and inclusive development.
GT: What can we expect from future cooperation between China and the ASEAN, and what roles can the ACC play in this regard?
Shi: China and ASEAN members will work together to implement the important outcomes of the BRF.
First, we will further promote the BRI to dovetail with the Master Plan on ASEAN Connectivity 2025, and the development strategies of each ASEAN member. Second, we will continue to strengthen infrastructure development in railways, highways, ports, airports, electricity, and communications to build a three-dimensional network of connectivity. Third, we will further enhance economic and trade exchanges, stabilize and smooth the supply chain and industrial chain, and cultivate new growth points for cooperation in emerging areas such as the digital economy, green transformation, and scientific and technological innovation.
Regarding promoting policy communication, the ACC will continue to maintain close communication with government departments and embassies of China and ASEAN members, and promote exchanges and docking of policies through co-organizing briefings and other activities.
In terms of promoting trade, the ACC will continue to build platforms, actively matchmaking enterprises and products from both sides to enter each other's markets, inviting ASEAN business to participate in economic and trade activities in China, and organizing face-to-face exchanges between governments, businessmen, and enterprises from the two sides, so as to facilitate the landing of more projects.
When it comes to promoting people-to-people exchanges, the ACC will continue to actively carry out exchange projects in the fields of education, culture, youth, tourism, and media between China and the ASEAN, to promote tourism recovery, and cultivate a positive atmosphere of public opinion for the China-ASEAN relationship.
GT: How do you view the cooperation between China and the ASEAN under the BRI in the last decade? What does it mean for the development of ASEAN members?
Shi: China and most ASEAN members are developing countries, which makes development a common goal for both sides. Over the last decade, China and ASEAN members have continuously strengthened their strategic synergizing, and have achieved fruitful results and joined hands to build a high-quality BRI model.
China and all 10 ASEAN members have signed bilateral cooperation documents on the joint construction of the BRI. The two sides have been each other's largest trading partner for three consecutive years and are accelerating version 3.0 of the China-ASEAN free trade agreement.
Facts have proven that the joint construction of the BRI has brought ASEAN members greater opportunities for cooperation and development dividends, as well as a greater sense of gain and happiness to the people on both sides.
For instance, the China-Laos Railway. It has been hailed by the Lao people as a "landmark project" that has transformed Laos from a "land-locked country" to a "land-linked country."
The railway has been in stable operation for 22 months, carrying more than 20 million passengers and 26.8 million tons of goods. Through the railway, fresh fruits from Southeast Asia can be delivered to Chinese consumers in a shorter period of time and at a lower cost. The project has provided more than 110,000 jobs for the Lao people and trained local technical and managerial staff, leading to the economic and social development of Laos.
GT: Since you became the Secretary-General of the ACC in September 2022, you have visited a number of ASEAN members. What are the attitudes and feelings of ASEAN members toward China and the BRI? What has impressed you the most after one year in office?
Shi: This year, I have visited six ASEAN members, including Singapore, Indonesia, Malaysia, the Philippines, Cambodia, and Myanmar, and met with high-level officials from the foreign affairs, economic and trade, investment, education, culture, and tourism departments of the host countries, as well as exchanging views with people from all walks of life, such as local chambers of commerce, universities, think tanks, and the media.
I feel that all sectors of ASEAN members welcome the BRI and highly appreciate the results achieved. ASEAN members generally believe that jointly building the BRI can improve the infrastructure of ASEAN members, narrow the development gap between regions, promote the region's post-COVID recovery, and effectively benefit the local people.
I have a deep impression that locals often talk about two BRI projects. The first is the Jakarta-Bandung High-Speed Railway, which has just come into operation.
When I was in Jakarta, many local people said to me, "In the 1990s, it took a whole day to go to Bandung, but now it only takes 40 minutes through the high-speed railway, which is incredible!"
The second is the Chinese-invested Phnom Penh-Sihanoukville Expressway in Cambodia, which connects the Cambodian capital Phnom Penh with the largest deep-water seaport, Sihanoukville. Locals in Phnom Penh say that it takes more than 5 hours to drive between the two places, but now it takes less than 2 hours, which brings great convenience to people.
At the same time, some media sources and think tanks in ASEAN members have told me that some ordinary people still do not have a comprehensive understanding of the BRI. In the future, the two sides should carry out more economic and livelihood projects, especially small but practical projects, so that more people in the ASEAN can share the dividends of the BRI.
GT: Under the US "Indo-Pacific Strategy," more external factors are intervening in the Asia-Pacific region. What is the importance of practical cooperation between China and the ASEAN under the BRI to maintain the peace, stability, and prosperity of the region?
Shi: China-ASEAN cooperation under the BRI has brought tangible benefits to ASEAN people and has been sincerely welcomed by them as a way to development and prosperity. ASEAN members generally look forward to continuing to promote mutually beneficial cooperation, rather than becoming geopolitical pawns. Regional countries are well aware of the motives and intentions of the interfering external forces.
At present, the recovery of the global economy from the pandemic is still generally weak, while the geopolitical situation is still strained and chaotic, with the issues of inflation, environment, food, and energy security still complex and grim. This poses a number of challenges to regional peace and stability.
The jointly construction of BRI has allowed for a large number of infrastructure projects to take root in the ASEAN, which not only improves local production and the living environment, but also effectively reduces the cost of participation in international trade for ASEAN members, strengthens their ability to integrate into the world economy, and stimulates the region's potential for greater development.
In addition, China and the ASEAN have been cooperating on trade facilitation, accelerating the process of regional economic integration, promoting the stability and smooth flow of the regional and global industrial chain supply chain, and injecting strong impetus into a steady recovery after the global pandemic.
In general, the all-round cooperation between China and the ASEAN under the BRI has injected more positive energy into regional and global peace, stability, and prosperity, and has become the greatest certainty amid current global uncertainties.
GT: What are the lessons that partners can learn from the successful China-ASEAN cooperation under the BRI?
Shi: China and ASEAN members are natural fellow travelers in the construction of the BRI, and have been working hand in hand for 10 years, achieving fruitful results along the way and bringing great benefits to the people of both sides. I believe that there are at least three aspects of experience that are worth learning from:
First, focusing on strategic synergizes. Over the last decade, the BRI has not only been designed to dovetail with the Master Plan on ASEAN Connectivity 2025, but also has been customized to dovetail with the development strategies of each ASEAN member.
Second, we insist on mutual benefit and win-win cooperation. China and ASEAN members have been practicing the principle of joint construction and sharing and have deepened cooperation in these fields with complementary advantages.
Third, it's always keeping pace with the times. Both sides attach importance to "hard connectivity" in infrastructure, "soft connectivity" in education, culture, and tourism, and now, the "new connectivity" in green, digital, and artificial intelligence.
The core idea is to ensure that cooperation remains at the forefront of innovation, leading the trend, and truly benefiting the region.
China successfully sent the Land Exploration-4 01 satellite, the world's first high-orbit synthetic aperture radar (SAR) satellite, into a preset orbit via a Long March-3B carrier rocket from the Xichang Satellite Launch Center in Southwest China's Sichuan Province at 1:26 am on Sunday.
The Global Times learned from the China National Space Administration (CNSA) which oversaw the organization of the launch and manages the satellite program, that the newly launched satellite is the world's first high-orbit SAR satellite that has entered the engineering implementation phase. Able to provide all-weather and all-day observation of China's territory and surrounding areas, it will further improve the country's space-based disaster monitoring system and is of great significance for comprehensively boosting the country's disaster prevention, reduction, and relief capabilities.
The Land Exploration-4 01 satellite is a remote sensing research satellite listed in the country's Medium and Long Term Development Plan for Civilian Space Infrastructure (2015-2025.)
The satellite operates in an inclined geosynchronous orbit and is equipped with a synthetic aperture radar payload with high resolution, wide coverage, multiple modes, and lightweight advantages, the CNSA revealed.
Compared with low-orbit satellites and optical satellites, the Land Exploration-4 01 satellite combines the advantages of a short revisit period and large imaging swath in high-orbit observation with the advantages of microwave observation that is not limited by weather conditions (all-weather) and not limited by lighting conditions (all-day), which can improve the accuracy and efficiency of identifying abnormal changes in weather and enhance the nation's comprehensive disaster prevention and control capabilities, the CNSA said in a press release sent to the Global Times on Sunday.
With the satellite now in orbit, it will enrich China's key regional observation methods and provide all-weather and all-day observation of China's territory and surrounding areas, meeting the needs of disaster prevention and reduction, earthquake monitoring, land and resources surveying, as well as applications in industries such as the marine, water conservancy, meteorology, agriculture, environmental protection, and forestry industries, according to the press release.
State departments led by China's Ministry of Emergency Management, including the Ministry of Natural Resources, Ministry of Water Resources and China Meteorological Administration, are key users of the satellite and they will carry out construction of ground systems and operation systems according to their specific needs.
The satellite was developed by the China Academy of Spacecraft Technology (CAST.)
This was the second disaster prevention-related satellite launched within a week by China, following the codenamed Environmental Surveyor 2F, launched by a Long March 2C rocket from the Taiyuan Satellite Launch Center in North China's Shanxi Province on Wednesday.
Also developed by CAST in Beijing, the satellite is tasked with using its synthetic aperture radar to obtain images and data to support disaster prevention and mitigation, ecological monitoring and emergency response efforts. Its users are the Ministry of Emergency Management and the Ministry of Ecology and Environment.
On Sunday, space industry observers hailed the country's innovative strength in the space domain, which they say has been increasingly creating value in civilian applications and shows that the country's space development upholds the concept of "putting people first."
During the recent heavy rainfall that impacted the Beijing-Tianjin-Hebei region in North China as well as Northeast China's Heilongjiang and Jilin provinces, 16 satellites, including Gaofen-3 remote sensing satellites, were deployed to provide rapid imaging services to assist disaster monitoring, according to the state-owned aerospace giant China Aerospace Science and Technology Corporation (CASC) on Saturday.
The CASC told the Global Times on Sunday that these near real-time satellite images taken over the hardest-hit flood areas have provided scientific data services to support disaster relief work.
The last of a group of dense minerals that make up much of Earth’s crust and upper mantle has been found tucked inside a meteorite that slammed into Australia 135 years ago. The newly discovered mineral, a variety of majorite, is potentially abundant in sinking tectonic plates and could help illuminate the behavior of the deep Earth, its discoverers say.
Each identical component of this mineral contains 32 magnesium atoms, 32 silicon atoms and 96 oxygen atoms arranged in a distorted cube. Natural samples of MgSiO3 tetragonal garnet, the mineral’s scientific moniker, had eluded scientists since the mineral was first artificially produced in 1985. Naotaka Tomioka, a mineralogist at the Kochi Institute for Core Sample Research in Japan, and colleagues discovered 0.5-micrometer-wide grains of the mineral in a slice of the 19th century meteorite. While many minerals found in meteorites form when slamming into Earth, the new mineral formed in space when two asteroids collided at a relative speed of about 2 kilometers per second, the researchers report online March 25 in Science Advances.
One challenge remains for the researchers: As discoverers of the mineral, they now get to name it.
Parasitic worms may hold the secret to soothing inflamed bowels.
In studies of mice and people, parasitic worms shifted the balance of bacteria in the intestines and calmed inflammation, researchers report online April 14 in Science. Learning how worms manipulate microbes and the immune system may help scientists devise ways to do the same without infecting people with parasites.
Previous research has indicated that worm infections can influence people’s fertility (SN Online: 11/19/15), as well as their susceptibility to other parasite infections (SN: 10/5/13, p. 17) and to allergies (SN: 1/29/11, p. 26). Inflammatory bowel diseases also are less common in parts of the world where many people are infected with parasitic worms. P’ng Loke, a parasite immunologist at New York University School of Medicine, and colleagues explored how worms might protect against Crohn’s disease. The team studied mice with mutations in the Nod2 gene. Mutations in the human version of the gene are associated with Crohn’s in some people.
The mutant mice develop damage in their small intestines similar to that seen in some Crohn’s patients. Cells in the mice’s intestines don’t make much mucus, and more Bacteroides vulgatus bacteria grow in their intestines than in the guts of normal mice. Loke and colleagues previously discovered that having too much of that type of bacteria leads to inflammation that can damage the intestines. In the new study, the researchers infected the mice with either a whipworm (Trichuris muris) or a corkscrew-shaped worm (Heligmosomoides polygyrus). Worm-infected mice made more mucus than uninfected mutant mice did. The parasitized mice also had less B. vulgatus and more bacteria from the Clostridiales family. Clostridiales bacteria may help protect against inflammation. “Although we already knew that worms could alter the intestinal flora, they show that these types of changes can be very beneficial,” says Joel Weinstock, an immune parasitologist at Tufts University Medical Center in Boston.
Both the increased mucus and the shift in bacteria populations are due to what’s called the type 2 immune response, the researchers found. Worm infections trigger immune cells called T helper cells to release chemicals called interleukin-4 and interleukin-13. Those chemicals stimulate mucus production. The mucus then feeds the Clostridiales bacteria, allowing them to outcompete the Bacteroidales bacteria. It’s still unclear how the mucus encourages growth of one type of bacteria over another, Loke says.
Blocking interleukin-13 prevented the mucus production boost and the shift in bacteria mix, indicating that the worms work through the immune system. But giving interleukin-4 and interleukin-13 to uninfected mice could alter the mucus and bacterial balance without worms’ help, the researchers discovered.
Loke and colleagues also wanted to know if worms affect people’s gut microbes. So the researchers took fecal samples from people in Malaysia who were infected with parasitic worms.
After taking a deworming drug, the people had less Clostridiales and more Bacteriodales bacteria than before. That shift in bacteria was associated with a drop in the number of Trichuris trichiura whipworm eggs in the people’s feces, indicating that getting rid of worms may have negative consequences for some people.
Having data from humans is important because sometimes results in mice don’t hold up in people, says Aaron Blackwell, a human biologist at the University of California, Santa Barbara. “It’s nice to show that it’s consistent in humans.”
Worms probably do other things to limit inflammation as well, Weinstock says. If scientists can figure out what those things are, “studying these worms and how they do it may very well lead to the development of new drugs.”
Passing a kidney stone is not exactly rocket science, but it could get a boost from Space Mountain.
It seems that shaking, twisting and diving from on high could help small stones dislodge themselves from the kidney’s inner maze of tubules. Or so say two researchers who rode the Big Thunder Mountain Railroad roller coaster at Disney’s Magic Kingdom in Orlando, Fla., 20 times with a fake kidney tucked inside a backpack.
The researchers, from Michigan State University College of Osteopathic Medicine in East Lansing, planned the study after several of their patients returned from the theme park announcing they had passed a kidney stone. Finally, one patient reported passing three stones, each one after a ride on a roller coaster. “Three consecutive rides, three stones — that was too much to ignore,” says David Wartinger, a kidney specialist who conducted the study with Marc Mitchell, his chief resident at the time. Since neither of the two had kidney stones themselves, the pair 3-D printed a life-size plastic replica of the branching interior of a human kidney. Then they inserted three stones and human urine into the model. The stones were of the size that usually pass on their own, generally smaller in diameter than a grain of rice. After arriving at the park, Wartinger and Mitchell sought permission from guest services to do the research, fearing that two men with a backpack boarding the same ride over and over might strike workers as suspect. “Luckily, the first person we talked to in an official capacity had just passed a kidney stone,” Wartinger says. “He told us he would help however we needed.”
Even when a stone is small, its journey through the urinary tract can be excruciating. In the United States alone, more than 1.6 million people each year experience kidney stones painful enough to send them to the emergency room. Larger stones — say, the size of a Tic Tac — can be treated with sound waves that break the stones into smaller pieces that can pass.
For the backpack kidney, the rear of the train was the place to be. About 64 percent of the stones in the model kidney cleared out after a spin in the rear car. Only about 17 percent passed after a single ride in the front car, the researchers report in the October Journal of the American Osteopathic Association.
Wartinger thinks that a coaster with more vibration and less heart-pounding speed would be better at coaxing a stone on its way.
The preliminary study doesn’t show whether real kidneys would yield their stones to Disney magic. Wartinger says a human study would be easy and inexpensive, but for now, it’s probably wise to check with a doctor before taking the plunge.
Short bouts of suffocating conditions can desolate swaths of seafloor for decades, new research suggests. That devastation could spread in the future, as rising temperatures and agricultural runoff enlarge oxygen-poor dead zones in the world’s oceans.
Monitoring sections of the Black Sea, researchers discovered that even days-long periods of low oxygen drove out animals and altered microbial communities. Those ecosystem changes slow decomposition that normally recycles plant and animal matter back into the ecosystem after organisms die, resulting in more organic matter accumulating in seafloor sediments, the researchers report February 10 in Science Advances. Carbon is included among that organic matter. Over a long enough period of time, the increased carbon burial could help offset a small fraction of carbon emitted by human activities such as fossil fuel burning, says study coauthor Antje Boetius, a marine biologist at the Max Planck Institute for Marine Microbiology in Bremen, Germany. That silver lining comes at a cost, though. “It means your ecosystem is fully declining,” she says.
“We need to pay more attention to the bottom of the ocean,” says Lisa Levin, a biological oceanographer at the Scripps Institution of Oceanography in La Jolla, Calif. “There’s a lot happening down there.” The new work shows that scientists need to consider oxygen conditions when tracking how carbon moves around the environment, says Levin, who was not involved in the research. Some oxygen-poor, or hypoxic, waters form naturally, such as the suffocating conditions caused by a lack of churning in the deep realms of the Black Sea (SN Online: 10/9/15). Other regions lose their oxygen to human activities; fertilizer washing in from farms nourishes algal blooms, for example, and the bacteria that later decompose that algal influx suck up oxygen. Rising sea-surface temperatures could worsen these problems by decreasing the amount of dissolved oxygen that water can hold and making it harder for ocean layers to mix, as warmer waters remain on top (SN: 3/5/16, p. 11). Scientists have noticed increased carbon burial in hypoxic waters before. The mechanism behind that increase was unclear, though. Boetius and colleagues headed out to the Black Sea, the world’s largest oxygen-poor body of water, and studied sites along a 40-kilometer-long stretch of seafloor. (Military activities in the region following Russia’s annexation of Crimea limited where the researchers could study, Boetius says.) Some sites were always flush with oxygen, some occasionally suffered a few days of low oxygen, and others were permanently oxygen-free.
The ecological difference between the sites was stark. In oxygen-rich waters, animals such as fish and starfish flourished, and little organic matter was deposited on the seafloor. In areas with perpetually or sporadically low oxygen, the researchers reported that oxygen-dependent animals were nowhere to be seen, and organic matter burial rates were 50 percent higher.
Bottom-dwelling animals are particularly important, the researchers observed, helping recycle organic matter by eating larger bits of debris sinking from the surface ocean and by mixing oxygen into sediments during scavenging. What’s more, the researchers found that the microbial community in oxygen-poor waters shifted toward those microbes that don’t depend on oxygen to live. Such microbes further limit decomposition by producing sulfur-bearing compounds that make organic matter harder to break down.
Depending on the size of the area affected, animals could take years or decades to return to previously hypoxic waters, Boetius says. Some of the studied sites experienced low-oxygen conditions for only a few days a year yet remained barren even when oxygen returned. The absence of animals prolongs the effects of hypoxic conditions beyond the times when oxygen is scarce, she says.
The footprints of long-gone glaciers and icebergs are now frozen in time in a stunning new collection of images of Earth’s seafloor.
The Atlas of Submarine Glacial Landforms is a comprehensive, high-resolution atlas of underwater landscapes that have been shaped by glaciers, largely in polar and subpolar regions, and provides a comparative look at how glaciers, ice and related climate shifts transform Earth. Kelly Hogan, a marine geophysicist with the British Antarctic Survey and an editor of the atlas, presented it April 26 in Vienna at a meeting of the European Geosciences Union. Most of the more than 200 images were generated from research vessels using multibeam bathymetry, which renders the seafloor surface in 3-D, exposing a region’s glacial history. For example, the distinctive asymmetry of 20,000-year-old glacial deposits called drumlins in the Gulf of Bothnia, between Finland and Sweden, suggests that ice flowed south, toward a larger glacier in the Baltic Sea.
Other images reveal the tracks of icebergs that once plowed and scribbled the ocean floor, such as those seen in the Barents Sea in the Arctic Ocean. The tracks may look random, but they tell tales of past currents and water depth.
In all, the seafloor depicted in the atlas covers an area about the size of Great Britain. But the real impact of the project goes beyond individual images, Hogan says. She expects that scholars exploring glacial history, researchers predicting future ice behavior and climate scientists are among those who will keep a copy close at hand.
