Collector's Addition

Look: Arctic fossil haul reveals dinosaurs lived year-round in cold conditions

Yet more evidence that these prehistoric giants were warm-blooded.

Hey Violet via Giphy

The idea that dinosaurs were exclusively cold-blooded lizards has lost its footing over the past decade.

Researchers are finding more evidence that some dinos were active in colder regions, indicating they were probably warm-blooded.

Remains have even been found above the Arctic circle.

Paul Souders/Photodisc/Getty Images

And a new study in Biology Letters gives even more weight to the idea that some dinosaurs lived year-round in the Arctic and Antarctic.

The research team spent roughly a decade completing excavations of a massive fossil haul in a North Alaskan region known as Prince Creek Formation.

Kevin May

They uncovered a bounty of microfossils — bits of bones and teeth from baby dinosaurs.

The researchers estimate that these remains represent at least 7 different species, both small- and large-bodied herbivores and carnivores.

"These represent the northernmost dinosaurs known to have existed"

Dr. Patrick Druckenmiller, study author


Though the researchers did not uncover any eggs, the presence of baby dinosaur remains shows that the species who found a home there stayed for breeding season, and may have been present year-round.

Landscape Away / 500px/500px/Getty Images

Arctic temperatures were warmer during the Cretaceous period, but high latitudes still meant several months of darkness per year and freezing temperatures in the winter.

Now the researchers are left with lingering questions. Namely: how did the dinosaurs cope with Arctic darkness, food scarcity, and extreme cold?

Photo 12/Universal Images Group/Getty Images

Alas, the lives of our favorite prehistoric creatures keep us in hot — or this case, cold — pursuit.

Read more stories about science here.

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