Creatures of Jurassic Era
In the Jurassic era, even the measly flea was a beast. It was a super-sized bloodsucker that feasted on dinosaurs with a saw-lie siphon. These undated handout photos provided by Nature show a female from the Early Cretaceous, left, and female and male fleas from the Middle Jurassic. (D. Huang/Nature) Click image to zoom.