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

Deinocheirus

For almost 50 years, scientists only knew this dinosaur from its massive eight-foot arms found in 1965. The full skeleton, described in 2014, shocked everyone with its unexpected duck-like bill and humped back. This Mongolian oddball likely waded through shallow waters, using its long arms to catch fish and dig for food. The discovery proved that arms alone tell just part of a dinosaur’s story.