Castoroides ohioensis, giant beaver Deinonychus and mosasaurs

and mosasaurs

The assembled multiple piece spear or dart could have been thrown by hand or with the aid of an atlatl (spear thrower)

very reptile-like tetrapods that lived during the Early Permian

It had short arms with two clawed fingers on each hand

rudolfensis

Castoroides ohioensis, giant beaver Deinonychus and mosasaursCastoroides ohioensis was a species of Giant Beaver, huge members of the family Castoridae (Rodentia), endemic to North America during the Pleistocene epoch (1. 8 mya to 11,000 years ago). These giant Ice Age beavers had a length up to 8 feet and an estimated weight of 130 220 pounds; some estimates went up to 485 pounds. It lived in North America during the Pleistocene epoch, and went extinct at the end of the last Ice Age, 12,000 years ago. Fossils