Scientists Unveil Surprisingly Tiny T. Rex Ancestor (washingtonpost.com)

It's called Raptorex, which makes it the coolest-named dinosaur to date.

If they don't know where it came from, how do they know it's older than T. Rex? And I thought dinosaurs were basically reptiles, which keep growing their whole adult lives, so how could a young adult be almost full-grown if it never stops growing?

They say it's small, but if this thing was coming after you, you could kiss your ass goodbye.