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When Dinosaurs Ruled the Arctic Circle

5m 52s

Pachyrhinosaurus and Edmontosaurus - undertook an epic migration every year to reach the fertile grounds of the northern latitudes in summertime. This was far from an easy task. Deadly predators lurked nearby looking to pick off weaker members of this giant herd. But evidence is starting to suggest that these two maybe have used their complementary strengths to fend off predators and communicate.

Aired: 06/14/25
Extras
A fight breaks out amongst the mega herd of Pachyrhinosaurus gathering to migrate north
A young Albertosaurus, a relative of T. Rex, earns her place in a fierce hunting pack.
In late Cretaceous Alberta, many apex predators roamed free, so how did the prey survive?
Imagine finding a rare fossil that you’ve been desperate to find - only for it to be put at risk.
What would make a Utahraptor so much larger than other raptor species?
It’s grudge match time. Except that this one took place over millions of years.
An injured Lusotitan lies on the beach, vulnerable to attack from the deadly Torvosaurus.
In an attempt to initiate a courtship dance, a male Lusotitan puts his best foot forward.
Staying close to the herd is the only chance for baby Pachyrhinosaurus to survive danger.
Albertosaurus work as a group to hunt down prey much larger than they are.