The Xihoumen Highway and Railway Bridge in East China's Zhejiang Province marked phased progress when 18 drill piles belonging to pier No 5 of the bridge, each with a diameter of 6.3 meters - the world's largest - were injected with cement on Sunday, state broadcaster CCTV reported.

The final cement injection was completed on Sunday, according to CCTV.

Since drilling work began in July last year, workers overcame technological challenges in the construction of the drill piles, which have the world's largest diameter, measuring 84 meters in length, of which a 37-meter-section is plunged firmly into bedrock beneath choppy water at a maximum depth of 60 meters in the area. 

The completion of the cement injection at pier No 5 was completed ahead of schedule, according to the report.

The Xihoumen Highway and Railway Bridge, dubbed the world's longest super sea-crossing bridge with a total length of 3,118 meters, and connecting Zhoushan's Jintang and Cezi islands, is among a total of 10 landmark projects Zhejiang Province is undertaking to boost regional connectivity. 

The bridge will allow trains travel at speeds of up to 250 kilometers per hour and will link up with Zhoushan, Zhejiang's last city not connected by rail.

The bridge has a main span of 1,488 meters. Its width, at 68 meters, is also the world's widest for a dual-purpose sea bridge. 

As China rings in 2024 with a bang, a number of Chinese localities including East China's Anhui and Central China's Hunan provinces have launched a new round of major projects, reflecting a robust start to the new year, which Chinese experts describes as an encouraging sign for economic growth.

Some 30,000 runners competed in the Beijing Marathon in the early morning of Sunday, starting at the Tian'anmen Square in downtown Beijing.

The race in the Chinese capital, dubbed the country's flagship marathon, attracted over 130,000 runners to register for the 30,000-slot lucky draw, as all participants, regardless of athletic skill level, are required to take on the full distance of 42.195 kilometers.

Chinese runner Chen Tianyu brought fresh competition to the race traditionally dominated by elite African runners, as he finished in the overall seventh place with a time of 2:08:11. Geleta Ulfata of Ethiopia won the championship in 2:07:41.

Though the result, surpassing the previous best domestic time set by Ren Longyun of 2:08:15 in 2007, Chen's time was just one second short of seeing him qualify for the Paris Olympics. But it makes him the third-fastest Chinese runner of all time, following compatriots He Jie and Yang Shaohui who clocked in 2:07:30 and 2:07:49 respectively at the Wuxi Marathon in March 2023.

"My original goal was to finish in under 2 hours and 10 minutes, but I felt great when competing with the elite runners," Chen, who is no stranger to endurance races, told reporters after the race, before crediting the optimization of the racecourse that reduced turns and slopes that contributed to his achievement.

The racecourse for the Beijing Marathon, the oldest marathon in China as it inaugurated in 1981, is considered picturesque, as it features several iconic landmarks in the ancient and modern metropolis including the Military Museum of the Chinese People's Revolution and the CCTV Tower, before concluding at the Olympic Park near the Bird's Nest or the National Stadium where the opening ceremonies of the 2008 Olympic Games and 2022 Winter Olympic Games were held.

Tandem marathon races were also held on Sunday in a number of provincial capitals across China, including Xi'an, Northwest China's Shaanxi Province; Ji'nan, East China's Shandong Province; Zhengzhou, Central China's Henan Province; Changsha, Central China's Hunan Province as well as Chengdu, Southwest China's Sichuan Province.

Running fever

Before the COVID-19 pandemic, marathons had grown in popularity in China.

In 2018, China witnessed a marathon boom with 278 certified events held in the Chinese mainland, followed by a total of 330 races in 2019, before a 2020 dip to just 51 races, according to the Chinese Athletics Association (CAA).

World Athletics road running manager Alessio Punzi said earlier in October that 68 Chinese running events filed their applications to World Athletics in 2023, while a total of 133 road races across China were registered between January and June, according to the CAA.

For those unable to make it to the Beijing event, an online race was also held on the popular fitness tracking site Keep, where participants who finished a recorded marathon race elsewhere stood to win a commemorative medal. As of press time, nearly 30,000 people had registered in the online race. 

Alongside an increase in the popularity of marathons in China is an increasingly health-conscious population in the country. 

A 2020 National Fitness ­Activities Report released by the Beijing-based ­National Fitness Monitoring Center revealed that among adults, walking and running were the two most popular physical activities, accounting for 22.7 percent and 19.8 percent, respectively.

"Hosting marathon races could immediately boost local tourism and further stimulate local economic growth, as it is a good marketing tool which utilizes good word of mouth if the events are well organized," Mao Jiale, a Chengdu-based sports commentator, told the Global Times on Sunday.

"Nowadays fitness and health have taken root in people's hearts, as we see the number of people taking exercise growing, especially after the national policy on fitness was introduced."

Recent statistics show that the number of people who regularly participate in outdoor exercise in China currently exceeds 400 million. 

Health concerns

Some fans raised concerns over the air quality in the Chinese capital on Sunday when the Beijing Marathon was held, as data from the China National Environmental Monitoring Centre designated it as "mild to middle pollution." 

This is not the first time that organizers have had to contend with air quality issues. 

It is, however, "extremely difficult" to reschedule the event as nearly half of the participants had made their way to Beijing from other cities across the country, an official with the organizing committee told the Global Times.

Jiang Chong, a physiotherapist who is also an occasional distance runner, warned that amateur distance runners should be aware of the consequences if they decide to participate in an ultramarathon.

"The path to marathon success is no walk in the park. Injuries to the hip, knee, and ankle joints are regularly suffered by marathon runners, as it is in fact a challenging endeavor to finish a marathon," Jiang told the Global Times.

"Targeted training in strength, speed, and endurance is paramount. Simply lacing up your running shoes without adequate preparation can lead to injuries that may prematurely end one's love affair with the sport."

She underlined that it takes scientific training, gradual progress, and setting achievable goals to successfully tackle the full 42.195-kilometer race.

"Warming up adequately before running, stretching after running, and training progressively are the foundations of consistent long-distance running," Jiang said.

"It is not only a matter of joints, but it also tests the effectiveness of the cardiovascular system. Regular medical checkups will also help to detect problems in time before worse problems occur."

With a smart wristband and a mobile phone, Amaris Malfa, a young Bostonian, "walked" into the ancient Chinese painting An Era in Jinling, and even interacted with the people depicted therein. 

"This is amazing! It is so vivid and vibrant, like a moving painting," Malfa said. "I really wish my fiancé could have seen it!"

The digital artwork An Era in Jinling, which enables visitors to physically immerse themselves in the dynamic city scape of Jinling, the ancient name of Nanjing, and wander in real time through the historical city from China's Song Dynasty (960-1279), has wowed many US visitors at the See Nanjing cultural exhibition at the Faneuil Hall Marketplace in Boston, Massachusetts.

The exhibition features Chinese garden arts and Nanjing's intangible cultural heritage, as well as Global Smile Delivery, a display of Nanjing's best wishes to the world that highlights the historical and modern elements of the 2,500-year-old Chinese city near the Yangtze River. 

"Seeing is believing and being part of it allows the overseas audiences to have a better and deeper understanding of the cultural heritage of Jinling and what people's lives looked like dating back 1,000 years ago," Ai Lin, the director of the Deji Art Museum in Nanjing who has led her team to develop this digital exhibition inspired by the ancient painting of the same name, told the Global Times on Wednesday..

According to Ai, the handscroll, magnified and projected onto a 110-meter by 3.6-meter screen, depicts a total of 533 figures, 90 animals, and over two dozen carriages, horses and sedans. Audiences can wander the streets and interact with these figures in real time. 

"The Deji Art Museum hopes to encourage visitors to explore and interact with history and art across time with the assistance of advanced technology, making each an ambassador of Chinese culture," said Ai. 

Before the US tour, Ai and her team members completed a lot of research in order to ensure every detail is close to locals' understanding of Chinese culture. 

"We managed to make it easy for them to access Chinese culture even if some of them may have little knowledge about China. We have an over 5,000-year-old culture, but how to show it and its stories to overseas audiences still remains a topic that we all need to explore," she said. 

"As a city that served as the capital of six dynasties in Chinese history, Nanjing is one of the cradles of Chinese civilization and produced a myriad of great people in history," Chinese Consul General in New York Huang Ping said in his opening address. 

"Like the Charles River in Boston, the Qinhuai River running through Nanjing has witnessed numerous major historical events."

With this Chinese art program and "the cultural feast" at the Faneuil Hall Marketplace, "I have no doubt that the 'Nanjing Week' will offer audiences totally new and multiple perspectives of this wonderful part of China," he said. 

He also released a tweet to recommend the exhibition: "The digital exhibition of an ancient painting, letters and paintings drawn by animals and insects will show you a perfect combination of culture, nature and urban development."

For Deji Art Museum, An Era in Jinling not only provides a window for the people of the US to get to know China's cultural treasures, but also raises their interest in China and Chinese civilization. Among the figures in the painting is a waiter being called "Tea Doctor," not because they had a doctoral degree, but because they are good at making and serving tea.

They are tea professionals from 1,000 years ago. Their amazing skills were not only popular in China, but were also introduced to other Asian countries like Japan, which was highly influenced by China's tea culture. 

"Things like that are interesting information that they want to learn and makes them want to learn more," Ai added. 

"The display and interaction of a single ancient painting is far from enough. The most important thing is to open a door for them into Chinese culture. A figure in the painting will say, 'Hello, Boston! Welcome to Nanjing,' inviting them to visit China to have a close look at this friendly country and people," added Ai, who said she hopes this creative digital artwork of Deji Art Museum can tour to more places and show more people "how wonderful Chinese art is and how cool China's technology is."

Boston Council President Ed Flynn said that the exhibition "is serving as a remarkable symbol of cultural understanding and exchanges, fostering goodwill, and strengthening the bonds of friendship between our two cities."

Besides this, the exhibition also features unique "Insect Poetry" and "Insect Painting," which represent a beautiful land of dreams and harmonious coexistence between mankind and nature.

As a renowned Chinese city with a long history and rich culture, Nanjing boasts a wealth of intangible cultural heritage, including Pingtan, a form of storytelling and singing in a local dialect, and Kunqu Opera, known as a living fossil of Chinese theatrical art.

Kunqu Opera, known as a living fossil of Chinese theatrical art.

Japan will start procuring Tomahawk cruise missiles from the US in fiscal year 2025, a year earlier than initially planned, Japan's defense minister Minoru Kihara announced on Wednesday at a press event in Washington after holding his first face-to-face talks with his US counterpart Lloyd Austin, the Kyodo News reported. Chinese military observers warned that if Japan intends to target other countries, it will also be included in the scope of potential counterstrikes. Moreover, the US' plan to deploy Tomahawk cruise missiles on its allies in the Asia-Pacific region, targeted at China, is an underestimation, and will ultimately be futile.

As part of preparations to acquire "counterstrike" capabilities, or the ability to hit enemy bases should the need arise, Japan plans to purchase 400 Tomahawks, which have a strike range of around 1,600 kilometers.

The defense chiefs "shared the recognition" that the procurement of Tomahawk Block-4 missiles will begin in the fiscal year starting in April 2025, the Kyodo News cited a Japanese official as saying, noting that the purchase still needs to be approved by the US Congress, with both sides, for this reason, refraining from calling it formally "agreed."

Tomahawks, first used in the 1991 Persian Gulf War, are allegedly able to cover Chinese coastal areas and are deemed essential by Japanese officials to beef up Tokyo's defense capabilities until Japan deploys home-developed ones.

Japan's deployment of Tomahawk missiles from the US aims to strengthens its ability to launch preemptive strikes and enhances military cooperation with the Washington, Song Zhongping, a Chinese military expert and TV commentator, told the Global Times on Thursday.

He explained that the sale of Tomahawk cruise missiles to Japan primarily focuses on their deployment on Aegis-equipped warships.

Chinese observers believe the US allows Japan to rearm itself and is helping Japan to acquire long-range attack capabilities to turn Japan into a more important pawn against China, while Japan wants to help the US to fight China in a bid to realize the "normalization" of its national defense force and achieve large-scale military expansion.

However, if Japan dares to launch attacks on other countries at sea, its own territory will also become a target for retaliation, therefore, Japan should not miscalculate and think that it can use weapons and equipment without facing consequences, Song warned.

In August, Australia announced it would spent $833 million to boost its long-range strike capabilities as it finalized a deal to buy more than 200 Tomahawk cruise missiles from the US, making it one of the three countries to have Tomahawks along with the US and the UK.

Experts said deploying Tomahawk missiles in allies reflected the US ambition of beefing up its military strength in the Asia-Pacific region and speeding up the construction of a "Tomahawk missile encirclement circle" targeting China.

Both Australia and Japan will undoubtedly face retaliation if they use their missiles to threaten the homelands of other countries. Both countries need to ask themselves what is more important: serving as pawns to maintain US hegemony or ensuring the security of their own nations? Song said.

The military expert also noted that countries daydreaming about forming an encirclement of China are overestimating their capacities, Song noted.

Even though a decade has passed, Grace Jessica can still vividly recall the moment when she read about Chinese President Xi Jinping's proposal on the "Belt and Road Initiative (BRI)" made during his visit to the Indonesian parliament in the newspaper. She referred to it as a crucial moment for herself because, since then, she has sensed Indonesia's increasing desire to connect with China, just like many other developing countries. From that moment on, her curiosity about China began to grow.

Almost a decade on, in 2019, Jessica, as a fresh university graduate, took a job as an assistant director at the Tegalluar Station, the end point of recently unveiled Jakarta-Bandung High-Speed Railway (HSR) line, a landmark project under the China-proposed BRI. Her participation in such an important national infrastructure project has become a point of pride for her family, and has made her a celebrity among Indonesian people.

"For us, mentioning China means 'more bridges, more roads, and more opportunities.' The rise of China is marked by its increasingly strong economic power, which is reflected in visible and usable roads and bridges," said Jessica. 

Jessica's summary of China is a microcosm of what China represents in the minds of many young people, especially Gen-Zers in Southeast Asian countries. 

In a recent visit to Thailand, Indonesia, and Malaysia, it was evident to the Global Times that despite West-led chatter and misinformation regarding China, many in these Southeast Asia countries have a rational understanding of China. They see more of China's friendliness, its mutual benefit philosophy, and positive regional influence rather than as an alleged threat.

Embracing China means embracing hope

Unlike previous generations, the younger generation in many Southeast Asian countries positively views China's market and technological strength. Jessica told the Global Times that Indonesians see better career development opportunities through the BRI. "I see embracing China as embracing hope both personally and nationally. The BRI infrastructure project in Indonesia means shorter distances to reunite with family, national pride, and expectations for rapid development." 

Gen-Zer Rizka Anggraini, a provincial top scorer in Indonesian national exam from South Sumatra Province, Indonesia, shares the same viewpoint. After graduating from high school, she applied for a Chinese government scholarship and chose to study in China instead of traditionally popular Western countries. Even before graduating, she had secured a place at a Chinese state-owned enterprise investing in energy projects in Indonesia. Some of her friends envy her proficiency in Chinese and her background of studying in China, which means a future income, especially as Chinese companies gradually expand their presence in Indonesia.

In February, the ASEAN Studies Centre of the ISEAS-Yusof Ishak Institute in Singapore released "The State of Southeast Asia: 2023 Survey Report," showing that China continues to be seen as the most influential economic (59.9 percent) and political-strategic (41.5 percent) power in the region. In comparison, the percentage of respondents who believed that "the US has the greatest influence" in these two areas were 10.5 percent and 31.9 percent respectively.

Another survey by Pew in 2022 showed similar trends, as a median of 66 percent across 19 countries believe that China's influence on the world stage is growing stronger, while just 32 percent say the same about the US. In each country surveyed, more than half of adults say China's influence in the world is strengthening.

The expansion of this influence is driven by the increasing presence of Chinese brands and China's burgeoning soft power on the global stage. 

Soft power promotes people-to-people ties

When journalists from the Global Times interviewed young people on the streets of Bangkok, Thailand, and asked what they were most interested in about China, their answers were mostly Chinese idols and TV dramas, Chinese cuisine, and "Made in China" products. 

In many Southeast Asia cities, Mixue, a Chinese store chain offering fresh ice cream and tea, for example, has become trendy on social media platforms. Social media users post about their daily cravings for Mixue products and make jokes and memes. Global Times reporters can often see the queue at the door of its shops.

Not only are Chinese brands popular in Thailand, but in 2020, Super Poll, a pollster in Thailand, conducted a survey on the "Sino-Thai friendship during the pandemic." In response to the question of "who is Thailand's closest friend during the pandemic," 73.3 percent of the respondents chose China, while Japan, the European Union, and the US were chosen by 8 percent, 4.4 percent, and 3.4 percent respectively. Noppadol, the head of Super Poll, stated that the survey shows the trust that Thai people have in China.

The Global Times' visit to the Confucius Institute at the Chulalongkorn University revealed that in Thailand, Chinese has gradually replaced Japanese as the second-largest foreign language after English, which reflects young people's increasing enthusiasm for Chinese and interest in China.

When discussing the impressions of young Malaysians toward China, former Malaysian ambassador to China Dato Abdul Majid emphasizes a division between them - those who have traded with or visited China usually hold a more positive perception, while those who have never been to China and only learn about the country from the media do not have a true understanding of the real China.

Majid hopes for more opportunities for communication to allow these people to see an objective and authentic China in order to eliminate misunderstandings.

China's first commercial spacecraft launch site in Wenchang, South China's Hainan Province, is ramping up the final stages of construction, and plans to commence normalized commercial launch operations in 2024, a representative from the launch site told the Global Times on Wednesday.

The construction of the commercial spacecraft launch site began in July 2022, and the infrastructure needed for the site will be finished by the end of 2023. The first commercial launch mission will commence in the first half of 2024, and the launch site will enter the operations and normalized launch mission in the same year.

"According to current plan, the commercial launch site will commence launch missions at a high frequency in 2025, which means commercial launch missions will occur each month," Dong Chenghua, a representative from the administration bureau of the Wenchang International Aerospace City, where the commercial launch site locates, told the Global Times on Wednesday.

On April 13, 2018, China announced a decision to support Hainan in developing the whole island into a pilot free trade zone and gradually exploring and steadily promoting the establishment of a free trade port (FTP) with Chinese characteristics. By the end of 2025, the Hainan FTP is scheduled to initiate independent customs operations throughout the whole island according to a master plan released by the central authorities in 2020.

As one of the 13 key projects of the island, the Wenchang International Aerospace City will support the Hainan FTP construction from sectors of aerospace and relevant industries.

During 2015 to 2021, the scale of China's commercial spacecraft launch industry realized an average annual growth rate of 22.3 percent, and may hit 2.3 trillion yuan ($320 billion) in market size by 2024, industry data revealed.

Another representative from the administration bureau told the Global Times that the commercial spacecraft launch is in great demand among domestic private enterprises at present, which is mostly used in communication, remote control and navigation.

The Wenchang aerospace launch site is China's only coastal launch site with multiple natural advantages such as lower geographic latitude, less transport restrictions and high security for landing sites, which will largely reduce the cost for commercial spacecraft launch.

The launch site has facilitated multiple key launch missions including the China's space station Tiangong and the lunar probe Chang'e.

In addition, Wenchang commercial spacecraft launch site may have chance to explore the commercial launch market among Southeast Asian countries based on Hainan's geographic advantages.

There must be something wrong with the guy who never leaves home, right? Maybe not — at least if that guy is a male spotted hyena. Males that stay with their birth clan, instead of taking off to join a new group, may simply be making a good choice, a new study suggests.

Spotted hyenas are a matriarchal society. Females are in charge. They rank higher than every male in the clan. And the females generally stay with the clan for their entire lives. But males face a choice when they reach two and a half years in age. They can stay with the clan, or they can leave and join a new clan.

Each choice has its pros and cons. Staying with the clan means that a male hyena keeps a place at the top of the male pecking order. He’ll probably have his mother around to help. But he’ll be limited in the number of females he can mate with, because many of the female hyenas won’t mate with him because they might be related. If he joins a new clan, the male hyena might have access to more females — and they might even be better than the ones in his home clan — but he’ll start with the lowest social rank and have to spend years fighting his way to the top.

Among most group-living mammal species, the guys that stay at home turn out to be losers, siring fewer offspring. But spotted hyenas, it appears, are an exception.

Eve Davidian of the Leibniz Institute for Zoo and Wildlife Research in Berlin and colleagues tracked 254 male spotted hyenas that lived in eight clans in Ngorongoro Crater in Tanzania throughout their lives, a study lasting 20 years. When these males reached the age of maturity, they left their clans to take a look at the other options available to them. Forty-one hyenas returned to their home clans, and 213 settled with new ones.

Even though the males that stayed at home probably had fewer potential breeding partners, they still managed to sire as many offspring as those males that left for greener pastures. Many mated at an earlier age, and they tended to mate with higher-ranking females than males that joined new clans. And both groups lived similar lengths of time, the researchers report March 18 in Science Advances.

The guys who stay at home, it seems, aren’t losers who couldn’t find better prospects elsewhere. They just found good enough prospects at home, where they are at the top of the social ladder — and have mom around to help them get access to food and females.

Seems like a good strategy — for hyenas, at least.

Even top-caliber diamonds aren’t perfect. And their imperfections are finally settling a debate about the origins of the gem-quality diamonds used in jewelry.

Previously, scientists had an explanation only for how cloudy and impurity-ridden fibrous diamonds form. Those diamonds crystallize inside fluid pockets deep within the Earth that contain compounds called carbonates. Carbonate-containing impurities inside fibrous diamonds provide information about the diamonds’ origins. Gem diamonds typically don’t contain these impurities, so scientists argued over whether the gems formed under different conditions than fibrous diamonds.
After an exhaustive hunt, geochemists have at last found microscopic impurities within gem-quality diamonds. These flaws suggest that pretty and ugly diamonds form from the same kinds of carbonate-containing fluids, the researchers report in the June 1 issue of Earth and Planetary Science Letters. The finding may also offer insights into the history of plate tectonics.

The work “gives us the first strong constraint on how gem diamonds grow,” says Thomas Stachel, a petrologist at the University of Alberta in Canada who was not involved in the research. “People had proposed various explanations for how these diamonds form, but it seems diamond formation is less diverse than we thought.”

Diamonds are made up of carbon atoms. At the pressures and temperatures found in the deep Earth, these carbon atoms can form a crystal structure. Rising magma then carries the crystals to the surface.

The type of diamonds prized for jewelry formed as early as 3.5 billion years ago. Fibrous diamonds date back only a few million years and formed more quickly. That quick creation trapped bits of surrounding material inside the crystal structure. Those inclusions suggest that these diamonds formed from the carbon atoms in carbonate-containing fluids. Gem-quality diamonds formed more slowly and usually don’t contain any inclusions. “That’s why they’re gem quality —there’s nothing in them,” says study coauthor Brooke Matat Jablon, a geochemist at the Hebrew University of Jerusalem.
Jablon and geochemist Oded Navon, also at the Hebrew University, hunted for inclusions in diamond gemstones. The researchers finally found what they were looking for in diamonds that are symmetrical across a central boundary. As these diamonds grew, a microscopic inclusion would sometimes become trapped along the boundary. Using a beam of electrons, the researchers identified 32 inclusions in eight of 30 diamonds they examined. Twenty of those inclusions were the same carbonate-bearing fluids found in the fibrous diamonds.
The finding suggests that while fibrous diamonds and gem-quality diamonds differ in age and price, they share common origins. “We’re coming full circle on the story,” Jablon says. “We can quiet a debate that has been raging in the field for a long time. Going forward, we can generally assume most diamonds crystalize the same way.”

A similar mechanism for creating older, gem-quality diamonds and younger, fibrous diamonds suggests that Earth has maintained diamond-forming conditions for billions of years, Stachel says. Carbonates are carried into Earth’s depths when tectonic plates subduct and sink into the planet’s interior. If ancient diamonds form from carbonates, plate tectonics could have already been churning the planet’s exterior 3.5 billion years ago, he says.

Seabirds called common murres appear to use preening as a way to negotiate whose turn it is to watch their chick and who must find food. And when one parent is feeling foul, irregularities in this grooming ritual may send the other a signal that all is not well, researchers report in the July issue of The Auk: Ornithological Advances.

“The fascinating part of this study is the inference that communication between mates allows murres to negotiate the level of effort that each member of the pair puts into the breeding effort,” says John Piatt, a wildlife biologist with the U.S. Geological Survey in Anchorage, Alaska. “Reproductive success of this species requires a high degree of cooperation by each mate as they switch duties.”
Common murres (Uria aalge) lay only one egg each breeding season. Parental roles aren’t determined by gender for the birds; mothers and fathers take turns watching over their chick and foraging for fish. When one parent returns with a fish for the chick, the couple preen each other and switch roles. This swapping ceremony typically happens three to four times a day.

But study coauthor Carolyn Walsh noticed that switches don’t always go smoothly. Video of 16 pairs of murres, documenting a total of 198 role swaps, showed that sometimes both birds appeared indecisive. Each parent would hop on and off the chick several times before the birds preened each other and one left to fish. “It’s as if they’re resisting leaving the colony; neither bird actually wants to go,” says Walsh, an animal behavior researcher at Memorial University of Newfoundland in Canada.
For about a fifth of all switching ceremonies, the brooding parent was slow to preen its mate and then refused to switch, forcing the parent that had just returned with a fish to go back out and fish some more.
Irregular behavior also occurred when the parent on fishing duty returned without food, which happened about 10 percent of the time. The empty-beaked bird would quickly start preening its mate, but the mate would be slow to preen back, or might not preen at all. “The brooder is basically communicating, ‘The chick still needs a fish, you better go get one,’” Walsh says.
The ceremony could be a way for the seabirds to communicate their well-being, Walsh says. By withholding preening and delaying the switching ceremony, a murre in poor condition may be trying to negotiate with its partner to have the easier job of brooding. Staying in the nest may allow the bird to rest and recover its strength.

Flying out to sea to fish is energetically costly for murres because they aren’t very aerodynamic. The seabirds are “absolutely ridiculous looking” when they fly, Walsh says. “Their wings are really meant for swimming in the water.”

In physical tests, Walsh and colleagues found a correlation between body condition and ceremony irregularities. Her team captured birds, weighed them and sampled their blood for beta-hydroxybutyrate, a metabolite associated with continual weight loss.

Switching ceremonies lasted about two minutes longer for the lightest birds, around 900 grams, compared with the heaviest birds weighing in at about 1,000 grams. Birds with lower mass and higher metabolite levels also were more likely to preen irregularly, Walsh says.

The longer ceremonies may also be a sign that there’s unrest in the nest. Murres usually mate for life, but pairs can “divorce.” A previous study by Walsh found that mates heading for a split take more time to switch roles.

Some dinosaurs liked to cheat on their vegetarian diet.

Based on the shape of their teeth and jaws, large plant-eating dinosaurs are generally thought to have been exclusively herbivorous. But for one group of dinosaurs, roughly 75-million-year-old poop tells another story. Their fossilized droppings, or coprolites, contained tiny fragments of mollusk and other crustacean shells along with an abundance of rotten wood, researchers report September 21 in Scientific Reports. Eating the crustaceans as well as the wood might have given the dinosaurs an extra dose of nutrients during breeding season to help form eggs and nourish the embryos.
“Living herd animals do occasionally turn carnivore to fulfill a particular nutritional need,” says vertebrate paleontologist Paul Barrett of the Natural History Museum in London. “Sheep and cows are known to eat carcasses or bone when they have a deficiency in a mineral such as phosphorus or calcium, or if they’re pregnant or ill.” But the discovery that some plant-eating dinos also ate crustaceans is the first example of this behavior in an extinct herbivore, says Barrett, who was not involved in the new study.

Ten years ago, paleoecologist Karen Chin of the University of Colorado Boulder described finding large pieces of rotted wood in dino dung. The coprolites were within a layer of rock in Montana, known as the Two Medicine Formation, dating to between 80 million and 74 million years ago. That layer also contained numerous fossils of Maiasaura, a type of large, herbivorous duck-billed dinosaur, or hadrosaur (SN: 8/9/14, p. 20).
Chin wondered whether the wood itself was the dino’s real dietary target. “The coprolites in Montana were associated with the nesting grounds of the Maiasaura ,” she says. “I suspected that the dinosaurs were after insects in the wood. But I never found any insects in the coprolites there.”

Her hunch wasn’t too far off. Now she’s found evidence of some kind of crustaceans in dino poop. The new evidence comes from an 860-meter-thick layer of rock in Utah known as the Kaiparowits Formation, which dates to between 76.1 million and 74 million years ago. Ten of the 15 coprolites that Chin and her team examined contained tiny fragments of shell that were scattered throughout the dung. They were too small to identify by species, and may have been crabs, insects or some other type of shelled animal, Chin says. Based on the scattering of shell fragments, the animals were certainly eaten along with the wood rather than being later visitors to the dung heap.

Since bones from hadrosaurs are especially abundant in the Kaiparowits Formation, Chin suspects those kinds of dinos deposited the dung. Other large herbivores, such as three-horned ceratopsians and armored ankylosaurs, also roamed the area (SN: 6/24/17, p. 4).

The crustacean diet cheat may have been a seasonal event, related perhaps to breeding to obtain extra nutrients, Chin and colleagues say.

But how often — or why — the dinosaurs ate the shelled critters is hard to prove from the fossil dung alone, Barrett says. Herbivore coprolites are rare in the fossil record because a diet of leaves and other green plant material doesn’t leave a lot of hard material to preserve (unlike bones in carnivore dung). Coprolites with crustaceans, on the other hand, are more likely to get fossilized — and that preferential preservation might make it appear that this behavior was more frequent than it actually was. “These kinds of things give neat snapshots of specific behaviors that those animals are doing at any one time,” he adds. “But it’s difficult to build that into a bigger picture.”