Scientists recently discovered a rare and important hagfish fossil that includes traces of preserved slime dating to 100 million years ago. Eyeless, jawless hagfish — still around today — are bizarre, eel-like, carrion-eating fishes that lick the flesh off dead animals using their spiky tongue-like structures. But their most well-known feature is the sticky slime that they expel for protection. And now, scientists know that hagfish slime is robust enough to leave traces in the fossil record, finding remarkable evidence in a fossilized hagfish skeleton excavated in Lebanon. ..." The fossil dates to the late Cretaceous period (145.5 million to...