【推荐1】On December 16, 2023, the first section of Maya Train officially opened, which runs between Campeche and Cancún, carrying up to 231 passengers across 290 miles and stopping at 14 train stations.

Built as an ambitious effort to promote tourism and boost Mexico’s economy, the rail system connects the major cities and tourist regions of the Yucatán Peninsula-from Cancún’s beaches to Tulum’s archaeological (考古的) wonders. Once the project is completed, the entire rail system will link tourist destinations across five states. However, environmentalists and archaeologists argue that the train route will cause great damage to the environment and ancient Mayan sites.

The Maya Train passes through six UNESCO World Heritage sites, and thousands of archaeological sites. One particular area of concern is the Calakmul biosphere reserve, which is home to many endangered species, such as jaguars and over 500 other animal species. The train lines, more than 60 meters wide, could act as artificial barriers that may limit the movement of these animals within the reserve, making it difficult for them to move around and access food and water sources.

Opponents also express safety concerns. Certain sections of the rail system will be built right on top of the aquifer’s (地下水层的) most fragile points of contact with the surface. “It’s like wanting to build over eggshells, says Guillermo Christy, a water treatment consultant.” Putting trains weighing thousands of tons on top could cause the underground caves to crash down. To construct the train infrastructure (基础设施) also requires driving long piles deep into the ground, which poses a big threat to this fragile ecosystem and leads to water shortages.

In the ongoing debate of Maya Train, it is crucial to consider the delicate balance between economic development and environmental preservation. While Maya Train may provide economic benefits, we must not overlook the potential environmental and cultural losses, as well as the safety risks it may bring. Achieving harmony between progress and conservation may be a significant challenge for the project, but we must take into account the long-term consequences of our actions.

【推荐3】Wasting things is a nightmare (噩梦) for the environment, especially food waste, which does double harm to the environment. A plenty of resources go into the food and the food system also produces lots of greenhouse gases and pollution.

In our homes, restaurants, and food shops, 17 percent of all our food is thrown away—that’s about a sixth of all of the food we have. If you add on the food lost in production, about a third of all food produced never reaches a mouth. At the same time, nearly 700 million people were affected by hunger in 2019, while 3 billion still struggle to afford healthy food. It is mostly households that are to blame: 11 percent of the food ends up in the trash of our homes, compared to a mere 5 and 2 percent from stores and restaurants.

The reasons why food goes to waste are probably familiar to you: dinner party leftovers that never get eaten, food going bad before you cook it, or simply confusion over sell-by and use-by dates that leads to totally fine food ending up in the garbage.

The UN aims to cut food waste in half at the consumer and sale levels by late 2022. Luckily, there’s actually a lot we can do as individuals and governments can make policies to help people and the environment a lot. For individuals, something important is being more thoughtful and prepared when going to the grocery store. Make a list of meals you want to cook, and then only buy fresh produce that you will 100 percent be eating in the next few days. In social aspect, improving education on how to preserve food and understand tricky labels (标签), encouraging food recycling and pushing companies to sell smaller quantities of healthy, fresh food for one or two people could all play a helpful role in bringing down the massive pile of eatable waste.

【推荐1】Emma Li spent almost three years on China's '996 schedule': working from nine in the morning to nine in the evening, six days a week. “I was deprived of all my personal life,” says she. Usually, she had a small window to eat, shower and go to bed-but she sacrificed sleep to regain some personal time. Often, Li would stay up surfing the internet, reading the news and watching online videos until well after midnight.

Li was doing what the Chinese have called 'bàofüxingáoyè' — or 'revenge bedtime procrastination' (RBP). The phrase spread rapidly on Twitter in June after a post by journalist Daphne K Lee. She described the phenomenon as when “people who don't have much control over their daytime life refuse to sleep early in order to regain some sense of freedom during late-night hours”.

Psychology may explain the reason why people would choose to regain this leisure time even at the expense of sleep. A growing body of evidence points to the importance of time away from work pressure. “One of the most important parts of recovery from work is sleep. However, sleep is affected by how well we separate ourselves from stress,” says Sheffield University's Kelly. It's important, she explains, to have a rest when we can be mentally distanced from work, which would explain why people are willing to sacrifice sleep for post-work leisure.

In fact, experts have long warned that insufficient sleep is an ignored global public-health epidemic (流行病). A 2019 survey showed that 62% of adults worldwide feel they don't get enough sleep. People mentioned various reasons for this lack, including stress and their sleeping environment, but 37% blamed their heavy work or school schedule. Long hours at the office aside, another part of the problem is that modern working patterns mean people find it harder to draw boundaries between work and home.

【推荐1】Scientists have successfully recovered RNA, a form of genetic material, from the remains of the Tasmanian tiger, an extinct Australian animal. The discovery could help scientists learn more about these creatures before they disappeared from Earth.

The researchers extracted the recovered RNA from the skin and muscle of a Tasmanian tiger specimen (标本) stored in a Swedish museum since 1891. This is the first time RNA has been successfully recovered from an extinct animal. The Tasmanian tiger was once a top predator, known for hunting kangaroos and other animals. The last known Tasmanian tiger is believed to have died in a Tasmanian zoo in 1936. Emilio Mármol Sánchez, from the Centre for Palaeogenetics, led the study describing these research results. Sánchez believes that the recovered RNA material provides a glimpse into the true biology of the Tasmanian tiger, offering insights into the cells and tissues of these extinct creatures.

While Scientists have in recent years taken RNA from different ancient animals and plants, how long RNA could survive at room temperature has been a subject of debate among researchers. The well-preserved condition of the Tasmanian tiger remains, which were in a state of semi-mummification (半木乃伊化), suggests that RNA can survive for longer periods under certain conditions.

The Tasmanian tiger looked similar to a wolf, except for the tiger-like lines appearing on its back. When people arrived in Australia about 50,000 years ago, large animal population losses followed. The arrival of European colonizers in the 18th century destroyed the remaining populations around the island of Tasmania.

Private “de-extinction” programs have been launched with the aim of bringing back some extinct animals. These include the Tasmanian tiger, flightless dodo bird and wooly mammoth.

However, many researchers have warned about the difficulties of using genetic processes to actually recreate an extinct species. While Sánchez said he too has concerns about such processes, he noted that he does “advocate for more research on the biology of these extinct animals.”

【推荐2】Glass Health is a San Francisco-based company co-founded by Dereck Paul and Graham Ramsey. It began by offering an electronic system for keeping medical notes and is now among several companies hoping to use artificial intelligence chatbots (聊天机器人) to make a difference in medicine. These firms believe that their programs could significantly reduce the paperwork pressure physicians face daily, and improve the patient-doctor relationship. “We need these folks not in burnt-out states, trying to complete documentation,” Paul says.

Some independent researchers have expressed their fears of the rush to include the latest AI technology in medicine. “I think it’s very exciting, but anything that involves decision-making about a patient’s health should be treated with extreme care,” says Pearse Keane, a professor of artificial medical intelligence at University College London in the United Kingdom.

Paul says he is well aware of the problems and that doctors who use his company’s AI system need to check it. “You have to supervise (监督) it in the way you supervise medical students, which means that you can’t be lazy about it,” he says.

His company is now working to reduce the risk of errors. He believes the underlying technology can be turned into a powerful engine for medicine. Paul and his coworkers have created. a program called “Glass AI” based on ChatGPT. A doctor tells the Glass AI chatbot about a patient, and it can suggest a list of possible diagnoses (诊断) and a treatment plan. Rather than working from the raw ChatGPT information base, the Glass AI system uses a virtual medical textbook written by human doctors as its main source of facts-something Paul says makes the system safer and more reliable.

Last December, his company had around 500 users. But after they introduced their chatbot, the numbers jumped. “We finished January with 2, 000 monthly active users, and in February we had 4800,” Paul says. Thousands more signed up in March, as overworked doctors lined up to give AI a try.

【推荐3】Art lovers around the world are remembering Leonardo da Vinci who died in France 500 years ago, on May 2, 1519.

A British art expert announced on Thursday that Britain’s royal family has a portrait (肖像) of the famous artist, often known simply as Leonardo. Martin Clayton, a royal art adviser, said the portrait’s owner is Queen Elizabeth II. He added that the image was made by one of Leonardo’s assistants shortly before his death. Clayton said the “straight nose” and other details look very much like the only other known portrait of Leonardo done in his lifetime. That picture was the work of Italian painter Francesco Melzi. It will be on display at the Queen’s Gallery with about 200 drawings from her collection of Leonardo’s works.

On Thursday, the presidents of Italy and France gathered in the French town of Amboise to mark the anniversary of the artist’s death. He spent the final years of his life in the town. Today art lovers around the world are celebrating Leonardo’s work. He is considered a true Renaissance man, working not only as an artist, but as a scientist and inventor. “There really hasn’t been anybody then or since who has combined this extraordinary genius for these totally different areas,” said Gregory Rubinstein. He is the worldwide head of Old Master drawings at Sotheby’s auction house. “I think that’s what’s at the heart of our fascination.”

Sotheby’s announced Thursday that an important Leonardo drawing is going on display in its New York offices next month. The drawing, called “Leda and the Swan”, was painted in 1506. It is based on a story from Greek mythology (神话). It has not been shown in public since 2003. Leonardo appears to have made the painting while he was also working on “Mona Lisa”, his most well-known painting. The Mona Lisa hangs in the Louvre Museum in Paris. Rubenstein said the “very complete and very beautiful” drawing appears to have been preparatory work for a painting that was never made or was lost. “It’s a very mysterious one because there is no surviving record. and no painting survives,” he said.