T-rex and its ilk owed hunting success to special serrated teeth

Many extinct creatures, including killer theropod dinosaurs like the notorious Tyrannosaurus rex, had serrated teeth, with jagged cutting edges to help them chew through flesh. Some years ago scientists noticed that theropods also had some unusual structures inside their teeth: interconnected cracks...

via L.A. Times - Science http://ift.tt/1h3tMkc