A head-butting dinosaur with a skull like a conker is helping scientists get a better picture of life 85 million years ago.
Dinosaurs vanished earlier than previously thought and the impact of a giant asteroid did not lead to their extinction, say scientists.
A skeleton of a Tyrannosaurus bataar, a distant cousin to the T-rex, sold at auction in New York on Sunday for over one million US dollars.
A giant skeleton of a dinosaur which last roamed Earth more than 150 million years ago has fetched £450,000 at auction.
The 55ft (17m) specimen of the long-necked Diplodocus longus went under the hammer at Summers Place Auctions in Billingshurst, West Sussex.
The sale of the female skeleton, 19ft (6m) tall and nicknamed "Misty", was the first UK auction of a large dinosaur skeleton, according to experts.
"There are probably about six of these in the great museums of the world, including in Pittsburgh and Washington," natural history expert Errol Fuller said.
It was found almost completely intact in 2009 by the sons of renowned palaeontologist Raimund Albersdoerfer near a quarry in Wyoming in the United States.
The skeleton was bought by an undisclosed institution and it will go on public display, auction officials said.
Researchers at the Natural History Museum have said a set of fossils stored for decades could be the earliest known dinosaur to walk the Earth.
The specimen was first studied by former curator Alan Charig in the 1950s during his PhD, but he died before his work was published.
Scientists have now identiified the Nyasasaurus Parringtoni fossils as most likely coming from a dinosaur that lived about 245 million years ago.
This is 10 to 15 million years earlier than any previously discovered species.
It is believed to have been the size of a Labrador dog with a tail more than a metre long.