Dreamland: Adventures in the Strange Science of Sleep

David K Randall's Dreamland is a review of the best scientific thinking that illuminates and important subject: namely, why do we spend a third of our lives paralyzed, eyes closed, having vivid hallucinations?

The dumb T.Rex controversy everybody's talking about

Scientists found a Tyrannosaurus Rex tooth embedded in the tailbone of a duckbilled dinosaur. Now, everybody wants to know: Does this mean T.Rex really was a predator, rather than a scavenger, as has been proposed in previous studies? The correct answer is "STFU." That's my paraphrase of John Hutchinson — who studies the biomechanics of large animals, including T.Rex. He says the "controversy" here doesn't really exist. That's because most carnivores are both predators and scavengers and most paleontologists would agree that T.Rex is no exception to that rule. Read the rest