News tagged with million years
Not by asteroid alone: Rethinking the Cretaceous mass extinction
(PhysOrg.com) -- At the end of the Cretaceous period some 65 million years ago, an asteroid slammed into Mexico’s Yucatan Peninsula, causing severe but selective extinction. While that is widely accepted, ...
Space & Earth / Earth Sciences
Jan 19, 2012 |
3.9 / 5 (14) |
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Over 65 million years North American mammal evolution has tracked with climate change
Climate changes profoundly influenced the rise and fall of six distinct, successive waves of mammal species diversity in North America over the last 65 million years, shows a novel statistical analysis led ...
Dec 26, 2011 |
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Massive volcanoes, meteorite impacts delivered one-two death punch to dinosaurs: study
(PhysOrg.com) -- A cosmic one-two punch of colossal volcanic eruptions and meteorite strikes likely caused the mass-extinction event at the end of the Cretaceous period that is famous for killing the dinosaurs ...
Space & Earth / Earth Sciences
Nov 17, 2011 |
5 / 5 (10) |
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Impact study: Princeton model shows fallout of a giant meteorite strike
(PhysOrg.com) -- Seeking to better understand the level of death and destruction that would result from a large meteorite striking the Earth, Princeton University researchers have developed a new model that ...
Space & Earth / Earth Sciences
Oct 19, 2011 |
4.1 / 5 (10) |
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Origin of dinosaur-killing asteroid remains a mystery
(PhysOrg.com) -- Observations from NASA's Wide-field Infrared Survey Explorer (WISE) mission indicate the family of asteroids some believed was responsible for the demise of the dinosaurs is not likely the ...
Space & Earth / Space Exploration
Sep 20, 2011 |
4.9 / 5 (9) |
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Primitive birds shared dinosaurs' fate
A new study puts an end to the longstanding debate about how archaic birds went extinct, suggesting they were virtually wiped out by the same meteorite impact that put an end to dinosaurs 65 million years ...
Other Sciences / Archaeology & Fossils
Sep 19, 2011 |
5 / 5 (3) |
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Archeologists find what might be the smallest Mesozoic dinosaur
(PhysOrg.com) -- Paleontologists digging in the south of England have unearthed what might be the smallest dinosaur ever discovered; at just a foot long and weighing only a couple hundred grams, the Ashdown ...
Other Sciences / Archaeology & Fossils
Jun 13, 2011 |
3.5 / 5 (2) |
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Trove of sea turtle and other marine fossils found along ancient new jersey coast
Paleontologists have discovered numerous marine sea life fossils at a dig site in Sewell, N.J., including sea turtles, crocodiles, other reptiles, and fish.
Other Sciences / Archaeology & Fossils
Jun 10, 2011 |
4 / 5 (3) |
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Scientists say comet killed off mammoths, saber-toothed tigers
First an explosion as powerful as thousands of megatons of TNT rained meteorites down on North America. Then forest fires broke out across the continent, sending up a thick layer of soot and dust that blocked ...
Space & Earth / Earth Sciences
Jan 02, 2009 |
4.2 / 5 (26) |
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