You won’t believe this: the biggest plot twist in mammal evolution comes from fossils smaller than a sesame seed! Scientists are digging up ancient teeth in the Arctic—yep, Alaska and Canada—and finding out that early mammals weren’t just surviving in the polar night, they were thriving and innovating. These mini fossils, long forgotten in museum drawers, are now revealing that mammals adapted to darkness and cold way earlier than we thought. Turns out, the Arctic might be the real birthplace of mammalian resilience! #Science #FossilFriday #ArcticMystery