A tiny 'ice mouse' with teeth the size of sand grains survived some of the coldest temperatures when dinosaurs roamed the Earth

Tue, 09/19/2023 - 13:06

A painting of Ugrunaaluk kuukpikensis, a duck-billed dinosaur, with an insert of the tiny Sikuomys mikros, a shrew-like animal, that illustrates a scene from ancient Alaska during the Cretaceous Period. — Sikuomys mikros would have had to dodge much-larger dinosaurs when it foraged for food.
James Havens

Researchers found fossil teeth of a tiny shrew-like animal that lived in freezing temperatures.
It lived in what's now Alaska among a slew of dinosaur species.
With teeth the size of mustard seeds, they were tiny, and their fossils are easy to miss.

Over 70 million years ago, dinosaurs lumbered through a wintry landscape in what is now Alaska. At the time, the Prince Creek Formation (PCF) was above the Arctic Circle and would've had constant darkness for four straight months.