It's been a long time—66 million years!—since the Cretaceous Period ended in explosive fashion, so there's a lot we don't know about our predecessors atop the food chain, the dinosaurs. Were they hot-blooded or cold-blooded, fast or slow, pack animals or lone hunters? What color were they, and what did they sound like? Could you really use one to make a record player, like the Flintstones did? Luckily, our Jeopardy! correspondent Ken Jennings has just published his seventh Junior Genius Guide, this one all about the dinosaurs! He's here all month to straighten us out on all the Mesozoic misinformation we thought we knew.
The Debunker: Did Some Dinosaurs Have a Second Brain in Their Butt?
Poor Stegosaurus. He hasn't walked the Earth for 150 million years, and people are still talking about how dumb he was. That's pretty much his whole reputation. He's the Dan Quayle of dinosaurs.