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A group researchers Sweden has unlocked one nature's biggest secrets. The scientists worked out how spiders make such strong silk when they spin their spider webs. The silk that spiders spin is incredibly strong and is tougher than steel. decades, scientists have been researching what makes the silk so amazing. Finally, researchers Sweden's University Agricultural Sciences and the Karolinska Institute have found the answer. They found that the materials for webs are stored a spider's silk gland as protein. The gland has a level acidity that helps to make the protein very strong silk. The researchers copied this process to make enough artificial spider-web silk to stretch one kilometer.

The new artificial silk could be very useful to humans. Doctors are interested it to use stitches. They also think it can help the skin recover a burn. Some doctors believe the new silk could replace torn ligaments the body. Airplane manufacturers and makers protective clothing also see many uses the new silk. Senior researcher Anna Rising spoke how important the discovery could be. She said: "This is the first successful example [copying] spider silk spinning. In the future, this may allow industrial production artificial silk for bio-material applications or the manufacture of advanced textiles." The silk could become an important new material us the future.

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