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Title: Rewriting prehistory: Dinosaurs ate grass
Source:
AP
URL Source: http://www.signonsandiego.com/news/ ... 117-1435-dinograss-eaters.html
Published: Nov 18, 2005
Author: Lauran Neergaard
Post Date: 2005-11-18 14:13:19 by A K A Stone
Keywords: prehistory:, Rewriting, Dinosaurs
Views: 877
Comments: 81
WASHINGTON – Imagine dinosaur terrain – full of ferns and palms, right? Better add some grass to that picture. A new discovery debunks the theory that grasses didn't emerge until long after the dinosaurs died off. Fossilized dung tells the story: The most prominent plant-eating dinosaurs were digesting different varieties of grass between 65 million and 71 million years ago, researchers report Friday in the journal Science. Advertisement Click Me! The earliest grass fossils ever found were about 55 million years old – from the post-dinosaur era. It's a big surprise for scientists, who had never really looked for evidence of grass in dino diets before. After all, grass fossils aside, those sauropods – the behemoths with the long necks and tails and small heads – didn't have the special kind of teeth needed to grind up abrasive blades. "Most people would not have fathomed that they would eat grasses," noted lead researcher Caroline Stromberg of the Swedish Museum of Natural History. Stromberg and a team of paleobotanists from India analyzed sauropod dung – the scientific term is coprolites – found in central India. The coprolites contained microscopic particles of silica called phytoliths, which form inside plant cells in distinctive patterns that essentially act as a signature. Amid the expected plants were numerous phytoliths certain to have come from the grass family, report Stromberg and Vandana Prasad of India's Birbal Sahni Institute of Palaeobotany. They included relatives of rice and bamboo and forage-type grasses. They didn't eat a lot of grass, the evidence shows. But grasses must have originated considerably earlier, well over 80 million years ago, for such a wide variety to have evolved and spread to the Indian subcontinent in time to be munched by sauropods, they concluded. "These remarkable results will force reconsideration of many long-standing assumptions" about dinosaur ecology, wrote Dolores Piperno and Hans-Dieter Sues of the Smithsonian Institution's National Museum of Natural History in an accompanying review. Beyond the great curiosity about dinosaur life, the discovery has implications about the coevolution of this huge plant family – there are about 10,000 separate grass species – with other plant-eaters, Piperno explained. Indeed, a mysterious early mammal that roamed among the dinosaurs had more suitable teeth for grazing, raising the possibility of an early adaptation, the researchers note.
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#5. To: A K A Stone (#0)
Interesting, considering that you've previously argued that the Earth is only 6000 years old.
They proved the dung had grass matter in it. They did not prove their point on the age. They are still wrong on the age. Radio carbon dating and other dating methods have been proven wrong. They use assumptions and circular reasoning.
Whatever, I suggest you read the article again. It doesn't say a damned thing about ALL dinosaurs eating grass. The only contention among scientists is when grasses first appeared.
the behemoths with the long necks and tails and small heads – didn't have the special kind of teeth needed to grind up abrasive blades. "Most people would not have fathomed that they would eat grasses," noted lead researcher Caroline Stromberg of the Swedish Museum of Natural History.
Hmm not so sure about that..
Hmm not so sure about that.. It's a big surprise for scientists, who had never really looked for evidence of grass in dino diets before. After all, grass fossils aside, those sauropods – the behemoths with the long necks and tails and small heads – didn't have the special kind of teeth needed to grind up abrasive blades. Both are from the article, whats your point? I can't see the image you linked real clear either.
#26. To: A K A Stone (#25)
Okay here's a link.. look at the differences..
Top • Page Up • Full Thread • Page Down • Bottom/LatestFossilized dung tells the story: The most prominent plant-eating dinosaurs were digesting different varieties of grass between 65 million and 71 million years ago, researchers report Friday in the journal Science.
#11. To: Dakmar (#5)
Interesting, considering that you've previously argued that the Earth is only 6000 years old.
#12. To: A K A Stone (#11)
#23. To: Dakmar (#12)
Whatever, I suggest you read the article again. It doesn't say a damned thing about ALL dinosaurs eating grass. The only contention among scientists is when grasses first appeared.
#24. To: A K A Stone (#23)
the behemoths with the long necks and tails and small heads – didn't have the special kind of teeth needed to grind up abrasive blades.
#25. To: Zipporah (#24)
the behemoths with the long necks and tails and small heads – didn't have the special kind of teeth needed to grind up abrasive blades.
Replies to Comment # 25.
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