I was once talking to Dougald O'Reilly, an archaeologist from Australian National University who's done a lot of research at Angkor Wat. He was talking about having just published a paper about a dig and centuries-old skulls they'd found, and a lot of technical data. He ended with a quip that it was a lot of head trauma, and, me not being a science guy at all, I thought he meant the paper was academically rigrous. No, every skull had had their heads bashed in.