Have you ever wondered how geckos can walk along ceilings without falling off? The secret is in their feet.
Gecko feet may look very smooth, but if you look under the microscope, you'd see that they are covered in millions of long hairs.
Scientists call these hairs setae (pronounced see-tee). Setae are special because they create small electrical forces. These act like glue and help the gecko cling to flat surfaces - even glass.
Inspired by gecko feet, scientists have made new types of sticky tape. These man-made materials are covered in millions of fibres that look like setae. These new materials are almost as sticky as real gecko feet.
In tests, these materials can be stuck and unstuck more than 1,000 times and still stay sticky. They can even be used under water.
They are also very strong. A piece the size of your hand can stick to and lift up a 40kg weight.