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Maiasaura is a characteristic fossil of the middle portion (lithofacies 4) of the Two Medicine Formation, dated from about 86.3 to 70.6 million years ago. [2] Maiasaura lived alongside the troodontids Stenonychosaurus and Troodon and the basal ornithopod Orodromeus, as well as the dromaeosaurid Bambiraptor and the tyrannosaur Daspletosaurus. [2]
Horner and others studied the histology of Maiasaura peeblesorum bones. They found that Maiasaura only took 8–10 years to reach adult body size. A 7 metres (23 ft) adult Maiasaura could have an adult body mass of over 2,000 kilograms (4,400 lb) despite hatching at a length of about half a meter and with a body mass of less than a kilogram ...
In 1993, he received the Golden Plate Award of the American Academy of Achievement. [10] Reconstructed cast by Horner of a Maiasaura emerging from its egg. In Montana during the mid-1970s, Horner and his research partner Bob Makela discovered a colonial nesting site of a new dinosaur genus which they named Maiasaura, or "Good
A nearly identical EQ range of 2.3 to 3.8 was found, and it was again noted this was higher than that of living reptiles, sauropods and other ornithischians, but different EQ estimates for theropods were cited, placing the hadrosaur numbers significantly below even more basal theropods like Ceratosaurus (with an EQ range of 3.31 to 5.07) and ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 2025. Not to be confused with Planet Dinosaur. 2003 American TV series or program Dinosaur Planet Starring Scott D. Sampson Narrated by Christian Slater Composer Dean Grinsfelder Country of origin United States No. of seasons 1 No. of episodes 4 Production Executive producers Jean Raymond ...
The earliest potential record of dinosaurs in North America comes from rare, unidentified (possibly theropod) footprints in the Middle-Late Triassic Pekin Formation of North Carolina. [1] However, the most reliable early record of North American dinosaurs comes from fragmentary saurischian fossils unearthed from the Upper Triassic Dockum Group ...
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Spearheads were found by a local artifact collector in Sharon Center, Ohio.From 1990 to 1993, the site was excavated by the Cleveland Museum of Natural History.Dr. David Brose, the former Curator of Archaeology, found the spearheads were in the style of Clovis points of the Paleo-Indians and "some of the oldest certain examples of human activity in the New World."