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 Tyrannosaurus Have Scrawny Little Arms?
The lamestream media, from The Far Side to the Toy Story movies, has spent the last few decades trying to convince us that the mighty prehistoric carnivore Tyrannosaurus rex should feel bad about its body. Specifically: that it skipped too many arm days at the Jurassic gym.