When watching a gecko climb up a vertical wall with ease, one may wonder if this is due to having sticky feet, really sharp ...

The molecules that make up the spatulae are attracted to the molecules of the wall, so the gecko’s feet stick to the wall. The gecko can break that interaction by bending its toes just right. Then, ...

These forces are very weak, but because the combined area of interaction is large, they allow geckos to stick to nearly any surface. Furthermore, the toes on their back feet are arranged in an ...