【推荐2】Environmental groups have long criticized the private jets(喷气式飞机) for being a large contributor to global carbon dioxide emissions, and last week, environmentalists made headlines by interrupting a private jet trade show in Switzerland.

Private jets often cover shorter distances than commercial ones. They are generally less efficient(高效的) and their emissions per passenger are much higher. According to data from European non-profit Transport and Environment, private jets can be 5 to 14 times more polluting than commercial planes, and 50 times more polluting than trains. Research made by Greenpeace showed that private jets in Europe alone emitted 3.39 million metric tons of CO₂ in 2022, nearly equal to the emissions from 753,000 gas-powered cars in the US driven for a year.

But experts say the private aviation(航空) industry can still play a role in the global fight against climate change, and some in the industry are looking at creative ways to diminish its environmental impact.

As a member of the International Air Transport Association(IATA), along with other major commercial airlines, Dubai-based private aviation company Jetex launched the 2050 Project: the zero carbon emissions.

“Jetex is always thinking about how to cooperate with everyone to deal with climate change,” said Dr. Suzanne, a professor of aviation at the University of Waterloo. “And now it is working on changing all of its locations into fully green ones in the future. Once it succeeds, it will offer a new approach to the environmental protection.”

Through a partnership with oil company Neste, in 2021 Jetex started offering sustainable aviation fuels(SAF), made from renewable waste, to passengers at its Helsinki Airport. That same year at its Paris Le-Bourget Airport, it began offering SAF produced by French company TotalEnergies, made from used cooking oil. A limited supply of SAF means it isn’t available at every airport, but the company says it wants to make SAF a fuel option to its travelers across all its locations worldwide.

【推荐1】Palestinian farmer Salman al-Nabahin was working in his garden in Gaza when he noticed that some of the new trees he’d planted on his land did not root properly. Curious about what might be causing the issue, al-Nabahin asked his son to help him start digging.

His son’s ax (斧子) struck something hard. When the two men began to clear away the dirt, they discovered an item they did not recognize. A little Internet searching provided the answer to their mystery: They’d come across a Byzantine-era floor mosaic (拜占庭时期马赛克地画) featuring birds and other animals.

This happened six months ago. Now, archaeologists (考古学家) are hard at work studying the flooring to learn more about its secrets and civilization values.

The mosaic features 17 images of birds and other animals presented in bright colors. Archaeologists believe artists created the flooring sometime between the fifth and seventh centuries, though they don’t know whether the mosaic had religious (宗教的) origins. In total, the land covering the entire mosaic is about 500 square meters, and the mosaic itself measures about 23 square meters. Some parts of the mosaic appear to be damaged, likely from the roots of an old tree.

“These are the most beautiful mosaic floors discovered in Gaza, both in terms of the quality of the vivid representation and the complexity of the pattern,” says René Elter, an archaeologist in Jerusalem. “Never have mosaic floors of this precision in the patterns and richness of the colors been discovered in the Gaza Strip.”

The Gaza Strip, which is located between Israel and Egypt and was a busy trade route throughout history, is home to many ancient civilizations. The farmer and his son discovered the mosaic about a kilometer from the border with Israel. Archaeologists and other experts are concerned about the mosaic’s future because of the ongoing conflict there and a lack of funding for historical protection.

【推荐3】Scientists found what could be the oldest evidence of cooking at the edge of the ancient Lake Hula in Israel at the Gesher Benot Ya’aqov, according to a newly-published paper. The remains, especially fish teeth, were discovered near places where scientists also found signs of fire. Tests showed the teeth had been exposed to temperatures that were hot, but not super-hot. This suggested the fish were cooked slowly over a low heat, rather than being put right onto a fire.

With all the evidence together, scientists concluded that these ancient humans had used fire for cooking some 780,000 years ago. That is much earlier than the next oldest evidence for cooking, about 170,000 years ago, which showed Stone Age humans ate burnt roots in South Africa.

Scientists believe cooking started long before this, though physical evidence has been hard to come by —considering the importance of using fire to cook. Cooked food makes it easier for the body to digest and get more nutrients. When early humans figured out how to cook, they were able to get more energy, which they could use to fuel bigger brains. Based on how human ancestors’ bodies developed, scientists guess that cooking skills would have had to appear nearly 2 million years ago.

Those first cooked meals were a far cry from today’s dinners. And at that time, humans started eating not just for fuel, but for their community. In a 2010 paper, scientists described the earliest evidence of a feast(盛宴), which was a specially prepared meal that brought people together for an event in a cave. This “first feast” came at an important turning point in human history, right as hunter-gatherers were starting to settle into more permanent living situations. Gathering for special meals may have been a way to build community and reduce tensions now that people lived closer to each other. Scientists believe ancient feasts served a lot of the same social uses that modern gatherings serve: People exchange information, make connections, or try to improve their position.