奇速英语

科学家研制出人造蜘蛛丝

Researchers know one of nature's big secrets. They found out how spiders make strong silk. It is stronger than steel. They found that there is a special acid(酸) in the place where the spider keeps its silk. This makes the silk strong. The researchers copied(复制) this. They made enough spider silk to stretch for one kilometer.

The new silk could be very useful. Doctors think it can help with stitches, burns and ligament damage. Airplane companies and clothes companies want it. A researcher said, "This is the first successful example of copying spider silk. This production of silk is a kind of bio-material."