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How an Evolutionary Arms Race Created Bizarre Dino Designs

5m 32s

It’s attack vs defense on an epic evolutionary scale. Utahraptor was the largest raptor to ever walk the Earth, honing its weapons and tactics to become a truly apex predator. And top of Utahraptors’ dinner wish list was Gastonia. But Gastonia were the spikiest dinosaurs to ever lived, covered in thick armor and developing their own deadly weapons with which to fight back.

Aired: 06/14/25
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Extras
Travel back in time to the dangerous journey of the Pachyrhinosaurus, where survival is at stake.
Staying close to the herd is the only chance for baby Pachyrhinosaurus to survive danger.
In an attempt to initiate a courtship dance, a male Lusotitan puts his best foot forward.
An injured Lusotitan lies on the beach, vulnerable to attack from the deadly Torvosaurus.
Discover the story of Lusotitan, one of the largest dinosaurs ever.
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.
When hiding from a Utahraptor, one small movement could blow our Gastonia's cover.
Albertosaurus work as a group to hunt down prey much larger than they are.
Gastonia have armor all along their back and tail, so how do Utahraptors hunt them?
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