Why Don't All Skeletons Become Fossils?


The skeleton of dinosaur Sue is one of the lucky few. Mark Wilson/Newsmakers
The skeleton of dinosaur Sue is one of the lucky few. Mark Wilson/Newsmakers

Skeletons of ancient animals sometimes become fossilized. But if this happened to every animal that ever lived, wouldn’t we be swimming in a sea of fossils right now? BrainStuff explains why only a fraction of animal bones turn into fossils.