Jun 18, 2015

Dinosaurs avoided tropics due to hot, dry climate: study

An unpredictable, yet scorching and dry climate kept large, grass-eating dinosaurs out of the tropics for some 30 million years after they first appeared on Earth, a study out Monday found. It has been a long-standing mystery: Why did long-necked dinosaurs seem to avoid ...

Dinosaur bones yield likely blood, collagen

Jun 10, 2015

Dinosaur bones yield likely blood, collagen

Scientists said Tuesday they have discovered what appear to be red blood cells and collagen fibers in dinosaur bones, a find that may boost prospects of prizing organic remains from a much wider range of fossils. Using molecular microscopy, a British team analyzed eight ...

'Hellboy' dinosaur unearthed in Canada

Jun 7, 2015

'Hellboy' dinosaur unearthed in Canada

A new horned dinosaur that was a relative of Triceratops has been unearthed in Canada, researchers say. The bones were found sticking out of a cliff along the Oldman River in southeastern Alberta about a decade ago. “However, it was not until the specimen ...

Expert judges that dinosaurs were warm-blooded

May 29, 2015

Expert judges that dinosaurs were warm-blooded

Dinosaurs were warm-blooded, according to a scientist who judged their metabolism using body mass and growth rates deduced from fossils of species including Tyrannosaurus rex. Paleontologist Michael D’Emic of Stony Brook University in New York took issue with the conclusion of other researchers last ...

Winged dino sets science world aflutter

Apr 30, 2015

Winged dino sets science world aflutter

The discovery of a pigeon-sized dinosaur with bat-like wings has exposed bizarre twists in the early evolution of birds, said scientists in China Wednesday whose conclusions were immediately challenged. Named Yi qi, for “Strange Wing” in Mandarin, the creature was an odd and unexpected ...

T. rex's vegetarian cousin puzzles scientists

Apr 29, 2015

T. rex's vegetarian cousin puzzles scientists

Tyrannosaurus rex, one of history’s most dreaded carnivores, had an odd-looking vegetarian cousin with a tiny head, long neck and stubby fingers, scientists said Monday, admitting its anatomy had them puzzled. Chilesaurus diegosuarezi had a birdlike beak with leaf-shaped teeth, evidence that it feasted ...

Fossils push back snake origins by 65 million years

Jan 28, 2015

Fossils push back snake origins by 65 million years

Snakes have been slithering on Earth far longer than anyone ever realized. Scientists on Tuesday described the four oldest-known snake fossils, the most ancient of which was a 10-inch-long (25-cm) reptile called Eophis underwoodi that lived about 167 million years ago and was unearthed ...