【推荐2】What's happening inside your bodies if you're drinking coffee every single day?

    1    

In addition to preventing diseases, coffee's caffeine content is directly linked with your brain. These effects are especially seen at low levels of consumption （about 75 mg）. Caffeine has been associated with positive action on the brain. It improves mental alertness, mood and attention, and helps with concentration. A 2013 study found that those who drank two to three cups of caffeinated coffee a day felt less depressed, possibly because caffeine's stimulant （刺激性的）effect helps further people's moods.

It might improve memory preservation.

While caffeine's positive effect on alertness, attention, concentration, and mood is not such a surprise, its ability to improve memory preservation is based on a fairly new study. We conclude that caffeine strengthens preservation of long-term memories in humans.     2     Nor will it always prove to have a positive impact on productivity.

It might help you become a better athlete.

Coffee-loving athletes: you're in luck.     3     The all-natural caffeine in coffee has been associated with improved physical performance, especially in aerobic （有氧的）or endurance exercise. The recommended amount of caffeine is 2-6 milligrams per kilogram of body weight.     4    

It might badly affect your daily routine if consumed too much.

    5     If too much coffee is consumed, some individuals may experience side effects, such as anxiety, panic, restless sleep, and caffeine dependence. The most serious symptom is a headache. As with overdoing anything, death is also a possibility.

【推荐3】Not getting enough sleep is bad for health. According to the research from the scientists, people who don’t get enough sleep are less willing to socialize (社交) with others. They are simply too tired to go out.

The researchers did a small study. They tested 18 young people who had good sleep after a sleepless night. The participants watched videos of people with neutral (无倾向性的) expressions walking towards them. When the person on the video got too “close” to them, they pushed a button to stop the video.

The participants kept the person at a distance of 60% further if they hadn’t got enough sleep. They felt that their personal space was being invaded (侵占). But when the participants got a good night’s sleep, they allowed the person to get much closer to them.

The result shows that the less sleep you get, the less you want to socialize with others. In turn, other people may think you strange and stay away from you. So if you want to be a more sociable (喜欢与人交往的) and popular person, sleeping well might help.

【推荐1】Cultural Websites

This is a guide with rich information and pictures to Ancient Greece, covering art, architecture, politics, Olympics, geography, history and other topics. The photo gallery with bird’s-eye images of Greek art is of note. Contents include maps, biographies and related links, though little in the way of engaging multimedia. The website last updated in 2008, and some links are broken.

Getty, an online museum, focuses on the visual arts and serves both general audiences and specialized professionals. Its Research Library is accessible to both on-site and far-away users. The Explore Art part permits you to look through many of the works of art on show. You can also view present or past exhibitions. There are also topics for discussion on many sides of art and art history.

The website contains main source materials connecting to the history and culture of the United States. It offers more than 7 million digital artworks from more than 100 historical collections. You can select collections to search and explore teaching and learning ideas with American memory.

The website is wonderful collections of public area and copy-permitted historical texts for educational use. With pages designed specifically to help teachers and students, it contains hundreds of well-organized sources and also includes links to visual and hearing materials, as art and archeology play an important role in the study of ancient history.

【推荐2】Planning a trip can be easier through an online travel agency than if you handle each part of the planning on your own. These are our top choices.

●Booking. Com

Booking. com was founded in 1996 and has grown into an industry leader that stands out for being an all-in-one trip planning platform. From the website, you can compare and book your hotels, flights, and even airport taxis. It lists more than 28 million choices — you can find more choices per destination on Booking.com than any other online travel agency.

● Skyscanner

Find deals on airfare, hotels, and car rentals with Skyscanner, which was established in 2001 and uses a special engine to compare prices from all online travel agencies. The Search Everywhere button on the homepage offers a list of the cheapest flight deals for destinations both locally and across the world.

● Hopper

Hopper is a travel app available on iOS and Android that aims to help travelers save on airfare by using historical data and their own algorithm (计算程序) to predict when flights will be cheapest. Some newer features since the app’s introduction in 2009 include freezing a price for a limited time — for an extra fee — as well as app-only discounts. The company claims a 95 percent accuracy rate at predicting (预测) flight rates a year ahead.

● I Like Local

Visit the website to look through a host of travel experiences in countries including Indonesia, Kenya, and Cambodia. The platform got its start in 2014 and has grown to 4, 000 local hosts. 100 percent of each booking fee goes to local hosts. Until now, 16,000 travelers have booked with I Like Local.

【推荐2】What are coronaviruses? Coronaviruses were discovered in the 1960s. They are a group of viruses that cause diseases in mammals and birds. In humans, coronaviruses cause respiratory tract infections.

The new coronavirus. At the end of 2019, a new type of coronavirus started spreading in China. This type of coronavirus is often called 2019-nCoV, novel coronavirus, or COVID-19. It is believed that the virus was transmitted from animals to humans. Some of the first cases were diagnosed in people who had visited a market selling live seafood and animals. Unfortunately, when viruses are transmitted from animals to people, it can take scientists a lot of time before they can develop a vaccine or medicines to cure it.

How does the virus spread? The virus appears to spread mainly from person to person. The transmission occurs when someone comes into contact with an infected person. For example, a cough, a sneeze or a handshake could cause transmission. The spread may also be caused by coming into contact with something an infected person has touched and then touching your mouth, nose or eyes.