Many animals do strange things before an earthquake. This news may be important. Earthquakes can kill people and knock down homes. The animals may help to save lives.

Some animals make a lot of noise before an earthquake. Farmers have told about this. Dogs that are usually quiet have started to bark(吠). Horses on farms have run around in circles. Mice have left their holes and run away. Cows have given less milk.

In a town in Italy, cats raced down the street in a group. That happened only a few hours before an earthquake. In San Francisco, a man kept tiny pet frogs. One Sunday, the frogs jumped around more than ever. They made loud noises, like bigger frogs. That night, an earthquake struck the city.

    People want to know when an earthquake is coming. Then they could get away safely. Right now, there is no sure way to know ahead of time. Maybe the best idea is watching the animals.

  Turns out，you're not just what you eat—you're also where you eat．

  Researchers found out that people had double the number of calories(卡路里)when standing in a messy kitchen compared to when they stood in an orderly one．

    The researchers had 98 women spend to minutes in kitchens，under the guise of (以……为幌子)asking them to wait for someone．Half of the women stood in a messy kitchen，with piles of newspapers，dirty dishes and a ringing phone．The other half of the women waited in a clean kitchen．

    Both kitchens had bowls of biscuits and carrots．Each woman in the messy kitchen ate twice as many cookies compared to those in the clean kitchen．

    Why did this happen?

    “Being in a messy environment and feeling out of control is bad for diets，''Lenny Vartanian，one of the researchers，said．“It seems to lead people to think，‘Everything else is out of control,so why shouldn't I be?'''

    The study's size was small，but the findings prove something we know all too well：Stress(压力)is bad for you．Stress often causes people to overeat．Beyond weight gain，too much stress can also increase a person's heart rate，and lead to painful conditions like headaches．

    While there are many ways to manage stress．including listening to music and exercising，this study shows that there are easy and quick things you can do to find calm．The next time you don't want to tidy up the kitchen，remember that the exercise will help you a lot in so many ways．

    In ancient Chinese stories, the moon is home to Chang'e and her pet rabbit Yutu. Now, Chang'e and Yutu are really there!

    On Dec. 2, 2013, the Chang'e-3 lunar probe（月球探测器）took off from Sichuan, China. On Dec. 14, 2013, it landed successfully on the moon. Several hours later, Yutu, China's first moon rover（月球车）, "walked" out of the probe and onto the moon.

    Yutu is a big robot that weighs 140 kg. It is about 1.5 meters long and 1.1 meters tall. It has six wheels and travels at 200 meters per hour.

    There are cameras on both Yutu and Chang'e-3. They can take pictures of each other. That's how Yutu got is first picture on the moon.

    Yutu and Chang'e-3 will explore（探索）the moon.

    Yutu can walk around and work for three months. It can look for natural resources（资源）on the moon. Chang'e-3 can work at the landing site for one year and it can watch the space from the moon.

    They both get energy from the sun. So they "get up" to work when the sun rises, and "go to sleep" at night.

    China is now the third country in the world to soft-land on the moon after the US and the former Soviet Union.

    Also, China is planning to send its Chang'e-5 lunar probe around 2017. The probe will fly back to the Earth and bring natural resources from the moon.

    When will China fly a human to the moon? There's no plan yet. But the door is now open.

    Big ocean fish have almost been endangered since the start of business fishing in the 1950s. The scientists found that the number of large fish has dropped by 90 percent in the past fifty years. The study took ten years. The researchers collected records from fishing businesses and governments around the world. The magazine Nature published (发表) the findings.

    The scientists say the common way called long line(多钩长线) fishing is especially harmful to large fish. This way includes many fishing lines that are connected (连接) to one boat. If these lines are joined together, they can reach one hundred kilometers. They hold thousands of sharp metal hooks to catch fish. Long line fishing is especially common in the Japanese fishing industry. Records showed that Japanese boats used to catch about ten fish for every one hundred hooks. The study says long line fishing boats now might catch one fish per hundred hooks.

    The scientists say business fishing can destroy groups of fish much faster than in the past. The study suggests that large fish can disappear almost completely from new fishing areas within ten to fifteen years. Ocean life systems could be destroyed.

    It's not the only worry that the number of large fish is becoming smaller and smaller. What's worse, they are smaller in size than their ancestors (祖先).

    There are many animals in danger, such as pandas, elephants, and South China tigers.

    The South China tiger is the smallest tiger in Asia. It is also one of the rarest tigers in the world. Scientists think that there might be a few South China tigers living in the wild, but they are still not sure about it.

    The South China tiger is special in its face, but it shares the height with the common tigers. In the past, the South China tigers lived in the forests. But today more than half of them are living in zoos. If there are not safe places for them, they will die out soon. Baby South China tigers need their mothers' milk in the first two months. The mother teaches her babies how to hunt.

    Scientists think that people should do something to protect the rare animals. If people take action together, these animals will have a better place to live in. We'll also live in a better world.