Studies shed light on Earth-shaking crash that doomed dinosaurs, led to rise of mammals, us
Feb. 7, 2013: A shrew-sized Cretaceous-age animal, Ukhaatherium nessovi, which is one of the many mammals used in a new mammal tree-of-life study. The fossil was discovered in 1994 in the Gobi Desert by the Mongolian Academy and the American Museum of Natural History. AP Photo/American Museum of Natural History, S. Goldberg, M. Novacek A hypothetical placental mammal ancestor, a small, insect-eating animal. A study details the family tree of mammals that have lengthy gestations before birth. It goes back to this shrewish critter slightly bigger than a mouse with a nasty set of teeth. And it first popped in the world a little more than 65 million years ago - just after the cosmic crash which is theorized to have caused the extinction of non-avian dinosaurs.
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dinosaurs cosmic crash Renne Natural History Paul Renne catastrophic cosmic collision Berkeley Geochronology Center mammals study Photo/American Museum shrewish critter family tree nasty set Earth-shaking consequences American Museum 65 million years ago mammal tree-of-life study placental mammal ancestor slow-footed dinosaurs O'Leary little timid mammals Natural History.AP Photo/American slow-witted dinosaurs shrew-sized Cretaceous-age animal dinosaurs.AP Photo/American Museum Natural History Museum cute squirrel-like critter Mexico.AP Photo/Courtney Sprain volcanic ash sample dinosaur extinction layer big final dagger long gestation period Director Kirk Johnson study co-author Michael Jurassic Park fame large non-avian kinds long furry tail University scientist Gerta Montana Stony Brook University likely ate insects big crash extraterrestrial crash space crash mammal study Maureen O'Leary comet insect-eating animal Gobi Desert Ukhaatherium nessoviPeople:
Paul Renne
Overall Sentiment: -0.133125
Relevance: 0.932787
| Sentiment | Quote |
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| 0.0693893 | "I think it's fair to say, without the dinosaurs having gone extinct, we would not be here," said Paul Renne, ... |
| -0.385214 | "straw that broke the camel's back" and killed off the dinosaurs, said Renne. |
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Maureen O'Leary
Overall Sentiment: 0.276871
Relevance: 0.411728
| Sentiment | Quote |
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| 0 | "This isn't something that is just a guess; this is something that is a result of the analysis," O'Leary said. ... |
| -0.0268022 | "This isn't something that is just a guess; this is something that is a result of the analysis," O'Leary said. "This thing had a long furry tail. It had a white underbelly and it had brown eyes." |
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Michael Novacek
Overall Sentiment: 0.289363
Relevance: 0.323159
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| 0 | "Boy, did a lot happen in about 200,000 years," said study co-author Michael Novacek, ... |
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Carl Buell
Overall Sentiment: -0.0665951
Relevance: 0.258141
Gerta Keller
Overall Sentiment: -0.0261559
Relevance: 0.252795
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Tyrannosaurus Rex
Overall Sentiment: -0.292683
Relevance: 0.242791
S. Goldberg
Overall Sentiment: 0
Relevance: 0.239954
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Additional Info:
StateOrCounty: Montana
Overall Sentiment: -0.282237
Relevance: 0.421951
Disambiguation: Location | PoliticalDistrict | AdministrativeDivision | GovernmentalJurisdiction | USStateReferences:
Facility: American Museum of Natural History.AP Photo/American Museum of Natural History
Overall Sentiment: 0
Relevance: 0.390282
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Studies shed light on Earth-shaking crash that doomed dinosaurs, led to rise of mammals, us
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New research pinpoints how the torch passed from one dominant creature on Earth to another, from the brutish dinosaur to the crafty mammal.
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