Scientists have unveiled a new species of bone-headed dinosaur :
which they say is the oldest in North America, and possibly the world. 8)
The new find, Acrotholus, dates back to 85 million years ago.
It was about the size of a large dog, weighed about 40kg (88lb), walked on two legs
and had a skull composed of solid bone over 10cm (4 inches) thick. ::LOL::