So strong is the stickiness of some geckos’ feet that the lizards can hang from a ceiling by a single toe. Despite that clinginess, the forest of adhesive fibers on the underside of each toe stays ...

Following is a transcript of the video. - My name's Mitchell Varela, and I'm going to show you how crabs clean dirt and grime from under your toenails. The types of crabs that I use are called striped ...