We have a winner of March Mammal Madness! With more than 4,600 voting in the final round for the nickname for our hypothetical placental ancestor, the winner is... 

This is it—the final matchup. We started with 32 potential names for our hypothetical placental ancestor. Now we’re down to two: Mancestor and Shrëwdinger. Which will it be? It’s your decision. Cast your vote now and give this creature a name!

Rising temperatures will lead to a massive “greening” of the Arctic by mid-century as a result of striking increases in plant cover, according to new research led by the American Museum of Natural History. 

It's down to just a final, furry 4 potential nicknames for our hypothetical placental ancestor! Vote for the two finalists now.

A video series on amnh.tv delves into the topic of dinosaurs, which arose some 230 million years ago and thrived until large dinosaurs became extinct about 65 million years ago. How did dinosaurs reproduce? A video explains.