These new tracks provide an unexpected glimpse into the Cretaceous period, particularly during a time — between 100 and 84 million years ago — when there was no skeletal fossil evidence of ...

Some of the earliest North Americans may have arrived on the continent using a "sea-ice highway" as far back as around 24,000 years ago.

Tyrannosaurus rex ancestors would have moved from Asia to North America around 70 million years ago, researchers say.

A prehistoric sea monster never-before-known to man was hunting prey in North America 85 million years ago, fossils found decades ago in Canada reveal.

The model shows how the planet looked completely different 100 million years ago, with the African continent divided in half, India situated near Antarctica and North America in pieces.

DNA from 2 million years ago recovered from sediments in Greenland is the oldest preserved DNA found to date, blowing past the previous benchmark of 1 million years set in 2021.

Fossil Tracks Reveal Dinosaurs Stomping Around Alaska 100 Million Years Ago The discovery allows us a peek at the past, hinting at mid-Cretaceous climate and ancient animal migration patterns.

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new study.

According to the study’s researchers, the Fijian iguanas evolutionarily diverged from their North American kin between 34 million and 31 million years ago, long after Gondwana broke up, making ...

This was an oceanic plate that stretched between the Pacific and North American plates some 100 million years ago, when the dinosaurs were at their peak.

Then, around 56 million years ago, we get this massive immigration of mammals into North America from other continents, and at that point, we see a divergence of functional diversity.