Clothes are traditionally made of natural materials, such as cotton, leather and wool. They are all from plants or animals, but that doesn't mean they're friendly to the earth. For example, farmers have to use a lot of chemicals to grow cotton plants.

    Scientists are now looking for new ways to make clothing materials. They hope the new materials are both comfortable and good for the earth. Scientists have worked out how to make materials out of cornhusks (谷壳), chicken feathers and rice straws.

    "They used to be useless things. We always have a problem of how to deal with them," Yang, a scientist says. "Now, we can turn them into beautiful materials. Chicken feathers are better than other things. They have small air pockets like honeycombs. That means it will be very warm if you use them to make a jacket or sweater, and I think more and more people will like to buy these kinds of clothes."

It is easy for many people to catch a cold in the springtime or fall. It makes us wonder if scientists can send a man to the moon, why can't they find a cure for the common cold? The answer is easy. There are actually different cold viruses out there. You never know which one you will get, so there isn't a cure for each one.

When a virus attacks your body, your body works hard to get rid of it Blood rushes to your nose and causes a block in it. You feel terrible because you can't breathe well, but your body is actually eating the virus. Your temperature goes up and you get a fever, but the heat of your body is killing the virus. You also have a runny nose to stop the virus from getting into your cells. You may feel very uncomfortable, but actually your wonderful body is doing everything it can to kill the cold.

Different people do different things to deal with colds. In the United States and some other countries, for example, people might have chicken soup to help them get over the cold. Some people take hot baths. Other people take medicine to stop different symptoms(症状)of colds.

There is one interesting thing to note一some scientists say taking medicine when you have a cold is actually bad for you. The virus stays in you longer because your body doesn't have a way to fight it and kill it Bodies can do an amazing job on their own. There is a joke, however, on taking medicine when you have a cold. It goes like this:

It takes about one week to get over a cold if you don't take medicine, but it takes only seven days to get over a cold if you take medicine.

The kites in Weifang never disappoint. Every year the Weifang International Kite Festival amazes visitors with creative kites, as "paper birds" of varied designs keep appearing in the sky.

Kites in China can originate from the Warring States Period when Mozi made the first "wooden kite". Kites didn't actually become popular until the Ming Dynasty. By the middle of the Qing Dynasty, artists who were good at kite making began to appear in Weifang. In 1984, the first Weifang International Kite Festival was held.

Kites were used in China during the wars at the very beginning. For example, they can be used to record wind readings, similar to ship flags at sea. Over time, kites became connected with relaxing activities, and were often flown during festivals and holidays.

Today, kite-flying is a popular activity in China, and the Weifang International Kite Festival is one of the largest kite festivals in the world. In 2024, 622 kite artists from 59 countries and areas took part in the event. Zhang Xiaodong,74, has attended all the festivals. In the early days, he only brought traditional kites to take part in the competitions, but this time, he used sound and light to make the story of Chang'e flying to the moon come "alive".

The festival is a great platform to share kite-making skills. It also brings the people of China and other countries closer. As one citizen put it, "No matter how far away kite lovers go, there is always a 'thread' in their heart that can pull them together."