If you like your big human brain, you can thank your nose — or at least the noses of your earliest mammal cousins.

That’s because 200 million years ago, a keen sense of smell drove an explosive growth in brain size that pushed mammals out from under the shadow of dinosaurs, a new study concludes.

— Read more at Mammals win by a nose: Sense of smell drove evolution of big brains at the Washington Post. Many thanks to nozknoz for the link!