Why do geckos climb walls?

Geckos climb walls using specialised toe pads covered in millions of tiny hair-like structures called setae. These setae create van der Waals forces, allowing geckos to stick to surfaces at a molecular level. This adaptation enables them to climb smooth and vertical surfaces effortlessly. Geckos can quickly release their grip by altering the angle of their setae, allowing them to move efficiently while avoiding predators or reaching food.