Study: About 2 5 billion T Rex roamed Earth but not at once wfmj.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from wfmj.com Daily Mail and Mail on Sunday newspapers.
Large lumps of pink quartzite were transported some 600 miles across what is today the American Midwest in the bellies of long-necked dinosaurs, a study concluded.
Researchers from the US explained that the giant sauropods likely swallowed the stomach stones, known as gastroliths , to help grind up food they had eaten.
The gastroliths ended up being buried in Wyoming s Morrison Depositional Basin during the Late Jurassic, 155–148 million years ago, when the dinosaurs perished.
The team knew the stones could not have originated there, as pink quartzite in North America is only found deposited in Idaho, Montana, New Mexico and Wisconsin.
By analysing minerals called zircons that act as little clocks, the team determined that the gastroliths formed 1.8 billion years ago, matching those from Wisconsin.
The Real Dilophosaurus Makes the Jurassic Park Version Look Tame howstuffworks.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from howstuffworks.com Daily Mail and Mail on Sunday newspapers.
Primates Appeared Almost Immediately After Dinosaurs Went Extinct, New Research Suggests
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cretaceouspaleogene extinction eventdinosaurenvironmenteric sargisgeological history of earthgregory wilson mantillamammalmammal taxonomyp ceratopsp janisaep mckeeverip uniopaleocenepaleogeneplacentaliaplesiadapiformesprimatepurgatoriusstephen chester
Artist s depiction of Purgatorius mckeeveri. (Image: Primates Emerged Almost Immediately After the Dinosaurs Went Extinct, New Research Suggests)
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A formation famous for producing
T. rex fossils has now yielded the oldest evidence of primates in the fossil record, in what is being hailed a significant discovery.
Primates Appeared Almost Immediately After Dinosaurs Went Extinct, New Research Suggests gizmodo.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from gizmodo.com Daily Mail and Mail on Sunday newspapers.