A single specimen of Yantarogekko balticus, a now-extinct gecko species, trapped in amber. About 54 million years ago, this little dude was climbing on part of a tree, got stuck, then covered in flowing resin, which hardened, landed on some kind of swampy ground, and was then washed away by a stream and deposited far away. Then, in 2005, some human found this little rock with half a lizard inside, which has now been studied, letting scientists know that a gecko's specialized 'sticky footpads' evolved at least 20 million years earlier than previously thought.