Scientists have been studying how people use money for long. Now they're finding some theories may apply to one group of monkeys.

    Researchers recently taught six monkeys how to use money. They gave the monkeys small metal disks(圆片) that could be used like cash and showed them some yummy apple pieces. The monkeys soon figured out that if they gave one of the disks to a scientist, they'd receive a piece of apple in return.

    If you think that is all the monkeys can figure out, you are wrong. Two researchers, Jake and Allison, acted as apple sellers in the experiments. The monkeys were tested one at a time and had 12 disks to spend in each experiment. Jake always showed the monkeys one apple piece, while Allison always showed two pieces. But that's not necessarily what they gave the monkeys. The number of apple pieces given for a disk was determined at random.

    Experiment One: Allison showed two pieces of apples but gave both pieces only half the time. The other half, she took one piece away and gave the monkey just the remaining piece. Jake, on the other hand, always gave exactly what he showed: one piece for each disk. The monkeys chose to trade more with Allison.

    Experiment Two: Allison continued to sometimes gave two pieces and sometimes one piece. But now, half the time, Jake gave the one apple piece he was showing, and half the time he added a bonus. Guess what? The monkeys chose to trade more with Jake.

    In the first experiment, the monkeys correctly figured out that if they traded with Allison, they'd end up with more treats. In the second one, when a monkey received two pieces from Jake, it seemed like again. When Allison gave the monkey only one piece instead of the two she showed, it seemed like a loss. The monkeys preferred trading with Jake because they'd rather take a chance of seeming to win than seeming to lose.

    We also sometimes make silly business decisions just to avoid the feeling that we're getting less, even when were not. Would you have made the same choices?

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    With the development of the television and the Internet, many people have changed their hobbies and the way that they enjoy their free time. Because of the television and the Internet, many people spend less time reading, so the aim of this article is to give reasons why people should read just for pleasure. The reasons that I give you are quite simple: to improve your knowledge, to have more fun, to make your imagination（想象）fly, to find new ways to express your ideas, and to have a better understanding of life.

    Firstly, you can improve your knowledge when you read. There are nil kinds of good books to choose from. People who read more usually have a better idea about life than those who do not read so often.

    Secondly, you can have fun and increase your imagination by reading books Children have very good imaginations, so parents need to read lots of stories that feed their imagination. Adults should try to develop their imagination by reading books that make them think amazing things.

    Finally, no matter how old you are, it can help you to have a better understanding of life and express your ideas to others in a simple and correct form.

    So I suggest that you read more. I know that many of us like to play on the Internet when we are free, but we must also not forget to read books. Try to choose good books in the beginning, and then I'm sure that you will never stop reading.

    The Asian country announced yesterday that China was putting tariffs or taxes on about $3 billion worth of imports from the U.S. The tariffs are on 128 American-made products, ranging from pork and fruit to steel pipes. This will make it more expensive for America businesses to sell those products in China. And China says this was done as a response to the tariffs that the U.S. recently put on imports of Chinese steel and aluminum.

    Meanwhile, U.S. President Donald Trump says more tariffs, new ones worth as much a $50 billion are being planned by the U.S. on additional goods from China. So, one big question is, will all this cause a trade war, when countries take turns putting tariffs on each other 's goods, causing prices to rise?

    We don't know yet. The U.S. and China ship hundreds of billions of dollars of goods back and forth every year. So, the tariffs we've seen so far are a tiny part of that. And America's treasury secretary says the U.S. and China are talking behind the scenes about how to prevent a possible trade war.

    But a number of experts are concerned this could turn into one and so are some stock investors. The Chinese tariffs were a major factor in a drop of the U.S. stock market yesterday when the Dow Jones Industrial Average fell 459 points. But just like it's hard to tell if a trade war is on the horizon, it's also hard to tell what kind of effects one could have decades down the road.

    Children are starting on digital devices at ever younger ages, and opinions on the effects of children's digital-media habits are deeply polarised.(两极分化的).

    Jean Twenge, a psychology professor, thinks excessive use of the internet and social media makes children lonely and depressed and poses serious risks to their physical and particularly their mental health, sometimes to the point of driving them to suicide.

    However, Daniel Kardefelt-Winther of the Innocenti research office of Unicef examined various evidence and found less cause for alarm than is often suggested. Most of the studies he examined seem to show that the technology helps children stay in touch with their friends and make new ones.

    The relationship between the use of digital technology and children's mental health, broadly speaking, appears to be u-shaped. Researchers have found that moderate use is beneficial, whereas either no use at all or extreme use could be harmful.

    What worries some experts more is that screens are becoming part of the middle-class armoury(武器) for perpetuating(巩固) social advantage. Children from well-off homes are enrolled in private classes to learn skills like "How to be a YouTuber", which poorer parents cannot afford.

    A family in Florida had a happy Christmas this year thanks to two local police officers, who answered a 911 call only to discover there was no emergency at all.

    When they arrived at the house of a single mother with two children, the officers discovered the younger child, about two years old, was playing with the phone. There were no signs of Christmas or holiday cheer in the house. "They weren't smiling. It seemed like they weren't happy at all. They were missing something," Officer Paramore said. "The mother mentioned that they weren't going to have a Christmas that year. It was pretty obvious that the family was struggling," he said. "So we told each other that something had to be done."

    Paramore and his partner, Barry Ward, left the house with a plan. The next day, they went to a supermarket and bought a tree, lights and some ornaments (装饰物) with their own money. Then they returned to the apartment to deliver some holiday cheer. "They hugged the tree," Paramore said. "I was glad to see that this family was going to have something to sit around and use." The police department posted the video on YouTube, hoping to share the happy news and inspire others.

    The department has received tons of donations and phone calls from people around the country asking how they can help the family. "We are covered," said Stephanie Slater, public information officer for the Boynton Beach Police Department. "We're asking people to do good in their communities on behalf of our officers. We appreciate it very much that people are talking about this after watching the news on TV because they need to see and need to be reminded that police officers are good guys," she said. "They are human beings who have a kind heart and they do things that go unnoticed like this every day."

The Best Maldives Island for Your Travel Style

Every resort（度假地） in Maldives is its own private island but choosing the right one for you can be difficult. Want to kick off your Indian Ocean holiday in style? Our guide will help you know what to look for in the hunt for your ideal island.

Waldorf Astoria Maldives Ithaafushi

You'll never go hungry at the Waldorf Astoria Maldives Ithaafushi, which has 1 1 restaurants, including ones specializing in garden-to-table cuisine. There are regular food-themed events, too—our favorites include Arabian Night and the Twilight Seafood Barbecue.

Four Seasons Resort Maldives

Considered one of the best spots in the Maldives for honeymoons, the Four Seasons Resort Maldives has a huge range of room categories and offers a brilliant selection of packages, including Island Romance packages that feature fantastic extras designed with couples in mind.

Fairmon t Maldives

There are numerous reasons to visit the Fairmont Maldives, including the fact that it's a great place to learn about sustainability, whether it's at the Sustainability Lab, where guests can turn discarded plastic bottles into jewelry or during excursions with marine biologists from a charity created to protect sea turtles.

Heritance Aarah

Heritance Aarah recently opened its Live Maldivian Village Museum, which focuses on 4,000 years of Maldivian history. Guests can learn about the art of coral stone carving and find out why locals are known as some of the world's best boat builders.

To ensure you experience the Maldives' best bits, schedule a holiday every month without fail. We're joking, but you get the point: think what you want to see and do, and brush up on the different areas' seasonal selling points.