Scientists have found living organisms(有机体) that could be 50,000 years old recently. The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope, which proves they are probably microbes(微生物).

    Penelope Boston leads the Astrobiology Institute at NASA, the space agency of the United States. These ancient organisms are able to exist by eating minerals such as iron and manganese. If the findings are confirmed, they will show how microbes can survive in extreme conditions.

    Researchers have been studying ancient microbes for nine years. Forty different kinds of microbes and some viruses were found in the underground area this time. The genetic(基因的) structures of these organisms are different from those of their nearest relatives –viruses. That is similar to that humans are genetically different from mushrooms growing in forest. The caves in Naica are 800 kilometers deep. Before the miners began working in the caves, the area was isolated from the surface and the outside world.

    Some of the caves are as big as the large religious centers built during Europe's Middle Ages. There are crystals(晶体) covering the walls. Scientists must wear special clothing to keep cool. And the clothing keeps the crystals safe from human germs or other damage. The researchers could only work for about 20 minutes at a time before they have to go to a room that is 28 degrees Celsius to cool down.

    NASA officials would not let Boston share her findings with scientific experts until the last week's announcement. So scientists could not say much about the findings. But Norine Noonan, a biologist at the University of South Florida, said she believed them. “Why are we surprised?” Noonan asked, “As a biologist, I would say life on Earth is extremely tough and versatile.” “What's more, these organisms are not the oldest life forms on Earth. Scientists published studies about living microbes that may be 500,000 years old several years ago,” she added.

The situation is that familiar — deadlines are approaching, time runs out, disorder and confusion fills the day. The feeling is just as familiar — a slightly faster heart rate, and shortness of breath. Yes, it is panic time.

    It's too late to kick yourself with "I should have started on this sooner." or "It was a mistake to accept this tight deadline." The only thing left to deal with the situation is to panic more efficiently.

    ① Focus.

Panic happens when you are on an overload — too many things to do, too much pressure, too little time. But if you focus on the tasks that you need to take care of, and line them up in a logical list, you can have better control of a highly stressful and wild situation.

    ② Get rid of distractions.

    Time wasters and unnecessary activities are the last things you need during this time. Let everyone know you are on panic mode and should not be disturbed unless it is an emergency.

    ③ Watch your time.

    Don't be too engaged in one detail so that you reduce your timing for the other important details. Mind the time and deal with each task so that you can finish all of the required activities sufficiently.

    Try to solve a panic situation as quickly as you can so that you can rest and get back your energy and strength for the next one.

    Michelle Kwan was born on July 7, 1980, in Torrance, California. The daughter of Hong Kong immigrants (移民), Kwan watched her older brother play ice hockey as a kid. She began skating when she was five, and entered and won her first figure skating competition at seven. She won the world title in the 1994 World Championships at the age of 13, and earned a spot as an alternate (候补者) for the 1994 Olympic Games. Kwan went on to capture the world title in 1996, 1998, 2000, 2001 and 2003.

    At the Nagano Winter Olympics in 1998, Kwan was believed to win gold, but ended up with a disappointing silver medal when fellow US skater Tara Lipinski surprisingly took first place. Shortly before the Salt Lake City Winter Olympics in 2002, Kwan, who was then the reigning world champ, surprisingly fired both her choreographer (编舞者), Lori Nichol, and longtime coach, Frank Carroll. Once again, she failed to get the gold medal when she finished third behind Irina Slutskaya of Russia and US skater Sarah Hughes, who took first.

    As a student at the University of California at Los Angeles, Kwan has continued to compete since her defeat (战败) in Salt Lake City. In February 2006, she was unable to take part in the Olympic Games in Torino, Italy because of a serious injury. Though Michelle Kwan did not compete during the 2006－2007 figure skating season, she has turned down an offer to work for NBC Sports and says she is not retiring.

    "What kind of rubbish are you?" This question might normally cause anger, but in Shanghai it has become a special "greeting" among people over the past week. On July 1st, the city introduced strict trash-sorting regulations (条例)that are required to follow and expected to be used as a model for our country. Residents must divide their waste into four separate categories and toss (投放)it into specific public dustbins. They must do so at specified times, when monitors are present to ensure correct trash-tossing and to ask the nature of one's rubbish. Individuals who fail to follow the regulations face the possibility of fines and worse. They could be punished with fines of up to 200 yuan ( $ 29). For those who repeat to go against them, the government can add black marks to their credit records, making it harder for them to get bank loans or even buy train tickets.

    Shanghai government is responding to an obvious environmental problem. It generates 9 million tons of garbage a year, more than London's annual output, which is rising quickly. But like other cities in China, it lacks a recycling system. Instead, it has relied on trash pickers to sift (筛选)through the waste, picking out whatever can be reused. This has limits. As people get wealthier, fewer of them want to do such dirty work. The waste, meanwhile, just keeps piling up.

    Many residents appear to support the idea of recycling in general but are annoyed by the details. Rubbish must be divided according to whether it is food, recyclable, dry or harmful, the distinctions among which can be confusing, though there are apps to help work it out. Some have complained about the rules concerning food waste. They must put it straight in the required public bins, forcing them to tear open plastic bags and toss it by hand. What they complain most is the short periods for dropping trash, typically a couple of hours, morning and evening. Along with the monitors at the bins, this means that people go at around the same time and can keep an eye on what is being thrown out no one wants to look bad.

When it comes to travel, sometimes wandering is one of the most exciting things you can do. In a time when travellers are both more adventurous and eco-conscious than ever, it's no surprise that there's a wealth of new vocabulary to describe how we travel, when we travel and how the experience makes us feel. Here are eight of our favourite travel words that you may not have heard before.

We've kicked off a blog with the staycation, "a holiday in one's own country". The term first became popular in the mid-2000s, when the global financial crisis meant people had less income to spend on flash holidays and instead searched for cheaper local choices. Since 2020, the staycation is experiencing a revival (复兴). Benefits of staycations include cheaper travel costs, no spending hours in the airport and, of course, no need to worry about whether your passport expired (过期) last year.

Once upon a time, if you wanted to meet new people on your travels, you could stay at a hostel or with a host on Airbnb. Now, you can couch surf. And not just in "the staying at various friends' houses until you find a new place to rent" sense: couch surfing is quickly becoming a hot new travel trend. Travellers can now choose to couch surf all across the world via a website which treats travel as a cultural exchange, allowing people to connect with willing hosts and crash on their sofas.

Given that single-use and climate strike were selected as the Collins 2018 and 2019 Words of the Year respectively, it's clear that the climate crisis is very much on everybody's mind. This desire to make more sustainable choices is also affecting the way we spend our vacation days. Ecotourism is another popular travel trend, defined as tourism that is designed to contribute to the protection of the environment. Examples of ecotourism include ditching short-haul flights, staying at eco-friendly resorts, or booking a staycation.

Humans act with purpose, but much is still unknown about how we become purposeful agents — that is, how we develop the ability to willfully make things happen. In a recent study to explore agency's mysterious roots, we tried to catch infants (婴儿) in the act of discovering their own agency, thereby revealing the process of agency formation.

Researchers place a baby into a cradle with a mobile suspended above. Then a scientist ties one end of a string to the mobile and the other to the infant's foot. Now if the baby moves, the toy will, too. By observing babies in this setup, scientists can watch as the infants learn and recall a simple cause-and-effect interaction: kick a foot and the mobile moves.

As predicted by the researchers, infants kicked significantly more when their foot was tethered (拴住) to the mobile than when it was not. However, when an experimenter pulled the string to make the mobile move instead, infants moved less than when the mobile was at rest. Furthermore, when we freed the babies' foot from the mobile, they kept on kicking at higher rate to make the toy respond — and were visibly frustrated when that did not happen.

Our observations also pointed to a notable pattern: The babies' initial movements consisted of twisting and pushing without clear direction. But once tethered to the mobile, the more intensely they moved, the more their attention was drawn to the effect their kicking had on it. At some point, the infants must have figured out that they had agency, thus the aimless movements became intentional action — a highly coordinated exchange between the tethered infant and the mobile.

The baby-mobile study emphasizes how understanding the relationship between an organism and its environment is essential to uncovering the origins of directed behavior. The experience of agency emerges only when an organism senses it is coupled to its environment. In this way of thinking, the interaction and relationship between the two are crucial for purpose to arise.