Thescelosaurus Neglectus

Type:Prehistoric

Diet:Herbivore

Size:12 ft (3.7 m) long; 650 lbs (300 kg)

Protection status:Extinct

Did you know?

The first Thescelosaurus specimens, collected in the late 19th century, sat in a crate for decades before they were rediscovered.

Hesperornis Regalis

Type:Prehistoric

Diet:Carnivore

Size:Length, up to 5 ft (1.5 m)

Protection status:Extinct

Did you know?

The bulk of Hesperornis fossils known are from Canada, a testament to the ancient bird's preference for cooler waters at northern latitudes.

Ammonite

Type:Prehistoric

Diet:Carnivore

Size:Some more than 3 ft (1 m) in diameter

Group name:School

Protection status:Extinct

Did you know?

Female ammonites grew up to 400 percent larger than males, presumably to make room to lay eggs.

Devil Frog

Type:Prehistoric

Diet:Carnivore

Size:16 in (41 cm)

Weight:10 lbs (4.5 kg)

Protection status:Extinct

Did you know?

Ceratophyrines, living descendants of the devil frog, are sometimes called "Pac-Man frogs," because their round shape and oversized mouth resembles the old video game character.