【推荐1】It’s not easy to classify viruses. They are not dead, because they have genes and evolve.     1     So viruses have one task: to find a host and use it to reproduce. They reproduce by controlling the host’s cells, eventually causing them to burst and die, which will cause illness. These following facts can help you get rid of them.

    2     Some viruses can even be spread via people who don’t have symptoms yet. Some super-spreaders may infect hundreds of other people without even realizing it. Take preventive action to prevent spreading viruses even when you don’t feel sick.

If you’re very overweight, you need to be extra cautious. Overweight people suffer from the flu virus 42 percent longer than those who aren’t overweight. Because being overweight is linked to many health problems, it may affect your immune system.     3     So you have to watch your weight.

Soap and water really are the best defense. Washing your hands with soap is practically a good way to prevent viruses.     4     Make sure to wash for a minimum of 20 seconds and dry your hands on a clean towel.

According to a research published in Molecules, green tea may be an immune booster. It may help you fight both cold and influenza viruses. Researchers found that drinking green tea regularly could help you recover from a cold quickly.     5    

【推荐2】Does eating have anything to do with exercise in our daily life? Some experts suggested that we should wait before exercise after eating. And the food you eat will decide how long you will wait before exercise.

Though not everyone who exercises after a meal experiences problems, eating a meal too close to the time you exercise could lead to discomfort. It’s because most food s take hours to digest and some people feel uncomfortable in the process, which could get in the way of meaningful exercise. “For some, eating right before exercise could cause an upset stomach.” adds Allen, a professor at Missouri State University.

According to recent researches, waiting to exercise after eating may better the quality of your exercise. It can improve one’s physical condition and better the exercise. The question then for many people comes down to how long they should wait between eating and exercising — a question to which there is no clear answer.

A good rule is for the time to correlate with the size of the meal one eats. “If you have a big meal such as a toast and potatoes, wait three to four hours to exercise. For a smaller meal such as a sandwich or a protein bar, wait about two hours. For something light like a piece of fruit or orange juice, thirty to sixty minutes is fine.” she advises.

But there is no hard and fast rule, and the time recommended can vary. “The time you wait depends on you, so experiment and see how long works best for your body.” says Allen, “If you can stand it, feel free to eat a healthy snack before you exercise. What I strongly recommend is to pay attention to your body’s needs and do what is best for you.”

【推荐1】Almost all kids pretend their dolls can talk or that their toys possess magical powers.    1    A study conducted by researchers at the University of Oregon found that by age 7, 37 percent of children had an invisible friend. In fact, imaginary companions are quite common in many people’s childhood.

And while there’s nothing wrong with kids who don’t have imaginary friends, children who have imaginary companions shouldn’t be a cause for concern either.

    2    

Some research indicates that kids with imaginary friends are more likely to be firstborn or only children, but that doesn’t mean imaginary friends are just for kids who are lonely. In fact, studies show kids who have imaginary friends are quite social and creative.

    3    On the contrary, they can be a tool that kids use to cope with their troubles. Kids who have experienced trauma (精神创伤)，for example, may rely on imaginary companions to help them through times.

While some parents worry that the invention of an imaginary friend means a child doesn’t have any real friends, imaginary friends don’t indicate a lack of social skills.    4    

Talking to an imaginary friend can even improve a child’s communication skills.    5    Consequently, studies show kids with imaginary friends may be better at understanding a listener or observer’s perspective.

【推荐2】It’s your nightmare — sitting down on the bus or train only to discover that your phone battery has hit the red. How will you check those important emails or post that funny Tweet you just thought of?

A simple solution might be to charge your phone overnight, so it’s ready to go when you are, but as it turns out, this might not be the best idea. Experts have warned that sleeping by a charging phone could in face be bad for us. According to David Gale, of Gale & Snowden, an eco-architecture firm, our nervous system operates at very low voltages (电压).

“Our brains use electricity to send messages to our muscles. For some people, the man-made alternating current that powers our phones can interfere with these processes,” he said. For this reason, some people may find it difficult to sleep near a charging phone or other electronics, reports MailOnline.

It’s also important not place a charging phone on your bed or under your pillows when you sleep, as this can cause a major fire risk. This is because the batter heats up while the phone is charging and sometimes it can get so hot that it catches fire.

According to Dominic Littlewood, a consumer affairs expert, you should instead try placing your phone in a plate when it charges. “That way, even if your phone gets hot, at least the plate won’t catch fire. It’s going to protect you a little bit,” he said.

However, there aren’t only risks to you that need to be considered. Charging your phone overnight can also cause damage to your phone. Experts at PC Advisor don’t recommend charging your battery to 100 percent. “It won’t fatally damage the battery if you do a full recharge. But constantly doing a full recharge will shorten the battery’s lifespan.”

【推荐3】Human activity has shrunk the size of wild animals the world over, and yet recent research has found many mammals (哺乳动物) living near cities have become steadily larger,   both in length and in weight.

“That wasn’t what we expected to find at all,” says Robert Guralnick, who studies biodiversity informatics at the Florida Museum. Expanding urban environments grow much hotter than natural habitats (生长环境), and warmer temperatures usually benefit mammals that have a smaller, more energy-saving figure — a principle of biology known as Bergmann’s rule.

As the world grows warmer, some scientists have worried that mammals living near cities are supposed to grow smaller, possibly reducing their fitness as a species and, no doubt, the fitness of being threateners (威胁者), too. But even with climate change, that might not happen. As it turns out, there’s another factor in determining a mammal’s size that might compete with or even go beyond temperature, and that is food.

In and around cities with large populations, where high-energy human foods are more widely available and hunters are fewer and farther in between, new research discovered that most of the mammal species studied appear to be growing in size, not shrinking. According to careful measurements of more than 100 species from North America, gathered from museum collections over the past 80 years, the main reason is not a city’s temperature. Instead, the greatest increases in weight and body length appear to lie among those mammals that live near the most humans, regardless of how hot their surroundings are.

As climate change grows worse, there is, of course, the possibility that that might change, but at least for now, it seems that wolves, deer, bats, and other mammals in North America could be affected more by city populations than city climates.

If we want to preserve the mammals that exist today for the future, it’s important that we know how human civilization is shaping their size, behavior and well-being. In a rapidly changing world, that knowledge could mean the difference between ongoing life and dying out.