Stress(压力) is everywhere in our everyday life. Not only men but also women and young people have it. The most important reasons of stress are: diseases, exams, making money, getting married, moving houses, changing jobs, ending friendships and so on.
How do you know whether you have stress? Give your answers to the following questions?

If you answer “Yes” to more than two of these questions, you are one of those people with stress. So what can you do about it? Doing relaxing exercises, talking with friends and listening to light music are all usual ways of relieving(减轻) stress. However, doctors now say that there are easier ways — people should laugh and smile more often. When you laugh and smile, your body relaxes. They also say that people, especially men, should cry more often, because crying is the natural way of relieving stress.

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    Hippos(河马) live in Africa(非洲). They are one of the world's largest land animals. Here are some interesting facts about them.

●Where are hippos born?

    Hippos often give birth in the water. The hippo babies get out of water right after birth to take their first breath.

●How quickly do hippos grow up?

    Hippo babies nurse both under water and on land for a year. Then they stop taking their mothers' milk but they are still with their mothers until they are eight years old. Then they move out.

●What do hippos love?

    Hippos love water and they spend most of the day in it to stay cool. The Hippo can breathe, see and hear when its body is under water because its nose, eyes and ears are on the top of its head.

●Do hippos swim better than people?

    Yes, they are great swimmers and they can hold(屏住) their breath for five minutes. Hippos can even walk under water along the bottom(水底) of rivers and lakes.

Surprising Camara.

    WATCH out! A slingshot(弹弓) is aimed at you. But don't be afraid. It's just a camara. It's called Slingshot Camara. The camara will catch your Surprised look. Pull the rubberhand(橡皮筋)back and shoot. It takes a Picture. Two designers from South Korea made's.

Making Use of Smog

    SMOG(雾霾)is annoying. But what if it could be made into a diamond(钻石)? A “Smog Free Tower” will try to do that, although the diamonds will not be as real ones. Black particles(颗粒)in smog and diamonds are mostly carbon. A designer from the Netherlands made the tower.

New Flower Home

    WHEN plants get too big, you have to move them from a small flowerpot to a big one. Now, the special Growth Flowerpot can save you time and energy. It's made of a special materal in origami style. It gets bigger and bigger as the plant grows. It is from Belgium.

Easy Bike Parking

    PARKING a bike is not easy in big cities. Here comes the bicycle-parking tower. You only need to use a card and push a button. Then the tower can hold your bike in an empty place inside it. You don't even need to lock the bike.

Solar Charged Light

    YOU can put it in your pocket. But if it's inflated(充气), it turns into a light! This is LumnAID, a solar light that can be on for 16 hours after recharging(充电) with just seven hours of sunlight. Two US students designed it.

    Have you ever heard of e-waste(electric waste,电子垃圾), which can be produced every day? How do you deal with your computers, MP4 players and mobile phones when they're broken or you want a new one?

    Most people just throw them away. With the development of electric industry, e-waste pollution has become a serious problem. According to the United Nations, in 2014, people around the world produced 41.8 million tons of e-waste and only recycled 6.5 million tons. The US was the biggest waster, producing 7.1 million tons. China came second, with 6 million tons.

    It's important to pay attention to e-waste. It can either be valuable or harmful（有害的）, depending on how we deal with it. E-waste is a valuable urban mine（城市矿藏）. The value of the metals, like gold and silver in the waste around the world, is amazing. And the metals can be reused. But if people throw them away, the toxic chemicals（有毒化学物质） can get into the earth or air,effectingthe environment and people's health.

    Apple, for example, now recycle people's used products in China when they are buying new ones. The company will test and repair the used ones and sell them at lower prices. To help reduce（减少）e-waste, we can also take computers and phones to see if companies offer recycling programs.

    When you look at the sky at night, the Moon looks bigger than the stars. Actually (实际上), the Moon is much smaller than the stars and the Sun. It's much smaller than the Earth. But the Moon is much closer to us than any star. That is why it looks so big. If you hold a coin close to your eyes, it looks big. If you look at it across the Moon, it looks small.

    The Moon moves around the Earth. It makes one trip in about four weeks. The Moon looks flat to us. But it is a round ball, like the Earth.

    People once thought the Moon had fire (火) on it. They thought the fire made it bright. Now we know the Moon is like a mirror. It gets its light from the Sun.

    Our sunlight comes from the Sun, too. What is the Sun? The Sun is a star. The stars we can see have their own light. There are many big stars we cannot see. Their light has burned out. Others are still bright, but they are so far away that we cannot see them. The Sun looks bigger and much brighter than other stars in Galaxy because it is the nearest of all stars. The Sun and the other stars we see are very hot, but the air around us saves us from the heat of the Sun.

    The Sun gives us light and warmth (温暖). It makes plants grow and turns leaves green. It makes life possible on the Earth. It is a life giving star.