The Duckbill Goes North

A long time ago, during the late Cretaceous, the world was much warmer. Forests stretched far north, beyond the frozen regions of Canada and Russia. Lush vegetation grew and housed a huge number of beasts, and the prove is in the sane.

Up at Denali National Park in Alaska they have unearthed the tracks of what appears to be a small herd of Duck-billed Dinosaurs. The ranged from adult to very young. Alaska suffered long winters, but much warmer climes in those days and the plant eating herds seemed to dwell there all year long.

Livescience.