New York Institute of Technology

The earth was a much hotter place in prehistoric times, so it follows that large heavily-armored dinosaurs likely retained a lot of heat in their bodies. A new study suggests that their brains were protected from overheating, however, thanks to a heat exchanging system in their noses.

Many whales feed by filling their mouths with water, then straining organisms out of that water as they expel it, using fibrous plates in their mouth called baleen. Now, scientists claim to have come a step closer to understanding how that baleen came to be.​