Blog post: swansont: Once You Pop, You Can't Stop

The pulling action and the presence of deep parallel grooves led the team to realise that these marks were probably not indicative of actual eating, but repositioning of the prey. The scientists suggest that the frills were in the way of Tyrannosaurus as it was trying to get at the nutrient-rich neck muscles.

 

“It's gruesome, but the easiest way to do this was to pull the head off,†explains Fowler with a grin. The researchers found further evidence to support this idea when they examined the

occipital condyles — the ball-socket head–neck joint — and found tooth marks there too. Such marks could only have been made if the animal had been decapitated.