【推荐1】“Is there life out there?” is a question which scientists are trying to answer. They look for life in space. In recent years, they have turned their attention to Europa, the sixth closest moon of Jupiter (木星).

Europa is a little smaller than the moon and is covered by ice. Its surface is too cold for anything to live there. Scientists want to know what lies under the ice, for that is where any life on Europa would most likely be.

For years, scientists believed all life on the earth depended on the sun. The discovery of chemosynthetic (化学合成的) life has changed scientists’ idea—planets with oceans (海洋) and hydrothermal vents (热液喷口) might also support life.

Europa does have oceans. In fact, Europa appears to have more oceans than the earth does. The ice on this moon’s surface covers what appears to be moving water. Do these oceans have hydrothermal vents? Scientists do not know yet. If they do, the oceans of Europa might support life. Only a space travel to Europa would tell for certain.

Scientists are studying the closest possible environment they can find on the earth: Lake Vostok. Like Europa’s oceans, Lake Vostok is miles under a frozen surface. It does not receive direct sunlight, either.

So like Europa, the lake cannot support photosynthetic (光合作用的) life. If scientists find life in the lake, it would support the idea that there might also be life on Europa.

【推荐3】China’s Shenzhou XIII crewed spacecraft docked with the Tiangong space station on Saturday morning, with astronauts ready to enter the station to start a six-month journey.

The three-member crew — mission commander Major General Zhai Zhigang, Senior Colonel Wang Yaping and Senior Colonel Ye Guangfu — will then float into the core module（舱）. They will install equipment and verify technologies and plans for the next steps in the Tiangong space station program. Their Shenzhou XIII spacecraft was lifted by a Long March 2F carrier rocket that blasted off at 12:23 am at the Jiuquan Satellite Launch Center in northwestern China’s Gobi Desert.

The mission is expected to become the longest crewed spaceflight by China, doubling the time spent in the Shenzhou XII mission. It will also see the first spacewalk by a Chinese woman.

【推荐2】If you find yourself feeling a little less cheerful than you were when days are going from summer to autumn, it’s not your imagination: there is a science-backed reason that you’re morelikely(可能的) to feel down in the cooler months.

“It’s real,” said Kathryn Roecklein, a professor in University of Pittsburgh. “The changes don’t alwaysaffect(影响) everyone in the same way” she added. Butseasonal(季节性的) mood changes often include less energy, feeling less social, losing interest in favourite activities and changes in sleep — you may have trouble sleeping or want to sleep more than usual.

There are a lot of reasons why our moodstend to(趋向) change with season, but a bigfactor(因素) is _______. “The hours of a day, which are shorter in winter and longer in summer, are the main reason,” said Roecklein. Sunsets are on their way to getting earlier and earlier as soon as autumn begins, so it’s not surprising if you feel those mood changes around the same time.

One key point to remember about the “winter blues” is that it’s NOT something we cannotovercome(克服). Here are a few things you can do. First, get yourself bathed in the sun. A walk outside in the sun in the morning will surely make you feel better.

Secondly, eat right. Try more fruits, vegetables and drink plenty of water. Besides, make time for your friends. It is said that a good chat with your best friends makes your day.

【推荐3】Tea and coffee are two of the most popular drinks in the world. However, people usually like one more than the other. These drinks also have very different uses.

Tea drinking started in China over 4,000 years ago. Tea is made from leaves. These days, some people drink tea for health, using it to help with stress(压力) or losing weight. However, most people in tea-drinking countries think of tea as more than just a healthy drink. In fact, tea drinking in some countries is a part of the culture. In Turkey(土耳其), tea is always there when people meet. Whether in someone’s home or a company, tea is always offered as a way of welcoming. In the UK, homes and offices usually have tea time. Tea and other dishes are served at tea time in the afternoon. It is a way of relaxing with friends or co-workers(同事).

Coffee came much later than tea, just over 1,000 years ago. Coffee is made from beans. Something in the coffee beans makes a person feel active. Most people do not drink coffee to relax. Instead, they drink coffee to get going. Many people drink coffee in the morning to help them wake up. Others will also drink coffee during short breaks in the afternoon to keep going through the working day. Some people may visit coffee shops just to meet and talk with friends. However, many people in coffee shops drink coffee while working on their computers.

Is tea or coffee more common in your country? Between the two, which do you like to drink more?