TRILOBITE (EXTINCT 3) (PB)

Usually a species has 10 million years or so of evolving, eating, chasing, playing, maybe doing homework, or even going to the moon before it goes extinct. Trilobite was a super-invader with its stomach in its head. 20,000 species of them survived over millions of years and even through two mass extinctions. Discover the secrets of these successful super-invaders and the Great Dying event which finally eliminated them 250 million years ago.