Pack attack: Tyrannosaurs ran in gangs, fossil footprints show

Talk about a triple threat! If you thought tyrannosaurs weren’t scary enough, try three of them at the same time. Turns out these fearsome beasts weren’t solitary hunters -- they ran in gangs, according to a study of the first fossil tyrannosaurid trackways ever discovered.



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