The giant asteroid that crashed into earth 65 million years ago may not have
killed all the dinosaurs.
Meet Polar Dinosaur.
Scientists in Alaska are mining the permafrost along the Colville River for
well-preserved dinosaur bones that suggest dinosaurs were very adaptable
animals. These fossils are found in ancient permafrost beds, suggesting that dinosaurs adapted to cold temperatures.
Dinosaurs living far north of the equator show bulging eyes and brains,
which may be adaptation to low light. Far north dinosaurs like hadrosaurs had skulls filled with hundreds of teeth, perhaps to grind up ferns and horsetails that thrived in colder climates.
It wasn't permafrost at that time. They also find evidence of warm weather plants like ferns.