Silicate dust produced after the asteroid prevented photosynthesis and plunged Earth into a brutal winter, killing the dinosaurs and 75 percent of life.
Dust was a major contributor to the extinction of the dinosaurs, scientists revealed in a new study.Dinosaurs became extinct due to a series of chain reactions triggered by an asteroid that hit Earth 66 million years ago. It plunged Earth into a brutal winter, which led to the downfall of about 75 percent of all life on the planet. Vegetation was also starved of sunlight—this meant no more food, for herbivores or carnivores.
'For the first time, we produce a paleoclimate model that takes into account the real measurement size of the dust, obtained in North Dakota,' Philippe Claeys, a geologist, planetary scientist and geochemist and professor at the Free University of Brussels, told Newsweek.'The very fine particles we detected have a very long residence time in the atmosphere, up to 15 years, which is longer than that of components in fact.
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