Gecko feet are unique adaptations that allow these lizards to climb various surfaces, including smooth walls and ceilings. Their toes are covered with millions of tiny hair-like structures called setae, which increase surface area and create adhesive forces through van der Waals interactions. This enables geckos to stick to surfaces without using any sticky substances. The structure of gecko feet is highly specialized, with each toe having a broad pad that helps distribute their weight. This design allows them to move quickly and efficiently in their natural habitats. Researchers study gecko feet to inspire new technologies, such as adhesive materials and climbing robots.