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The Cretaceous–Paleogene (K–Pg) extinction event, [a] also known as the K–T extinction, [b] was the mass extinction of three-quarters of the plant and animal species on Earth [2] [3] approximately 66 million years ago.
Luis Walter Alvarez, left, and his son Walter, right, at the K–T Boundary in Gubbio, Italy, 1981. The Alvarez hypothesis posits that the mass extinction of the non-avian dinosaurs and many other living things during the Cretaceous–Paleogene extinction event was caused by the impact of a large asteroid on the Earth.
The last such mass extinction led to the demise of the non-avian dinosaurs and coincided with a large meteorite impact; this is the Cretaceous–Paleogene extinction event (also known as the K–T or K–Pg extinction event), which occurred 66 million years ago. There is no definitive evidence of impacts leading to the three other major mass ...
We knew that an asteroid heralded the end of the age of the dinosaurs. Now researchers say they have discovered a key element in their extinction Scientists believe they have finally uncovered ...
“This huge glaciation and mass extinction event eliminated about 85 percent of the planet’s species.” Gigantic asteroid impacts can have a devastating effect for life on Earth, ...
Fine dust thrown up into Earth’s atmosphere after an asteroid strike 66 million years ago blocked the sun to an ... helped unravel some of the mysteries surrounding the mass extinction event.
Global cooling and sea level drop, and/or global warming related to volcanism and anoxia [41] Cambrian: Cambrian–Ordovician extinction event: 488 Ma: Kalkarindji Large Igneous Province? [42] Dresbachian extinction event: 502 Ma: End-Botomian extinction event: 517 Ma: Precambrian: End-Ediacaran extinction: 542 Ma: Anoxic event [43] Great ...
Despite the rarity of huge asteroid strikes, NASA and other space agencies are racing to learn all they can about potentially harmful rocks that could trigger another mass extinction event ...