The smallest dinosaur?

OCCASIONALLY, A FOSSILturns up that reminds people of how little is really known about the past. This, perhaps, is such a discovery. It is the skull, a mere 7mm long, of a tiny, yet full-grown dinosaur, preserved in amber from a deposit in northern Myanmar which is 99m years old. That dates it to the middle of the Cretaceous, more than 30m years before this period's more famous dinosaurian denizens,Ankylosaurus,TriceratopsandTyrannosaurus, bestrode what is now North America. Extrapolating from i...