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

Nigersaurus

First found in 1976 but fully described in 1999, this African dinosaur munched plants with over 500 teeth in a wide, shovel-shaped mouth. Nigersaurus replaced its entire set of teeth every few weeks, creating a living lawnmower effect as it grazed close to the ground. Its unusual horizontal feeding style and delicate skull structure made it unlike other long-necked dinosaurs from the Cretaceous period.