Lesser-Known Wonders: 30 Fascinating Dinosaurs You’ve Probably Never Heard Of

Therizinosaurus

This Late Cretaceous plant-eater from Mongolia sported massive scythe-like claws stretching up to three feet long. First named in 1954, Therizinosaurus combined a small head, long arms, and likely feathers on a body built nothing like your typical meat-eater. The claws could have slashed predators or pulled down branches to eat. Scientists still puzzle over exactly how this dinosaur used its terrifying hand weapons.