While most recent research has focused on geckos’ toes as the key to climbing walls and hanging from ceilings, UC Berkeley biologists have found that their tails play a critical role in preventing falls after a slip. The tail prevents pitch-back while the gecko regains traction. Unlike cats, which don’t need their tail to right themselves in midair, geckos also rely on their tails to rotate face down and then maneuver to a secure perch. Tails are now being designed for robots, but could also aid astronauts.