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Artist's impression of the asteroid slamming into tropical, shallow seas of the sulfur-rich Yucatán Peninsula in what is today Southeast Mexico. [13] The aftermath of the asteroid collision, which occurred approximately 66 million years ago, is believed to have caused the mass extinction of non-avian dinosaurs and many other species on Earth. [13]
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.
large primitive feathers 30–40 cm long with 3.5 mm quills believed to come from large dinosaurs; a turtle killed by impalement on a tree branch, found in the upper of two units of surge deposit, bracketed by ejecta (further evidence of the violence of the extinction event) [7] [8] broken remains from almost all known Hell Creek dinosaur groups
‘Chicxulub’ object seems to have come from out beyond Jupiter Scientists finally find where the object that wiped out the dinosaurs came from Skip to main content
The asteroid that killed most dinosaurs 66 million years ago left behind traces of its own origin. Researchers think they know where the Chicxulub impactor came from based on levels of ruthenium.
Scientists hypothesized in 1980 that a collision with a giant space rock led to the death of the dinosaurs. Back then, the researchers didn’t find the asteroid itself; instead, they found a thin ...
The study shows that the asteroid, while having a severe initial impact, did not immediately kill off the dinosaurs - instead slowly killing them off over a few years.
Walter Alvarez at the original site where he discovered the dinosaur extinction evidence near Gubbio, Italy. Alvarez and his father Luis W. Alvarez, together with Frank Asaro and Helen Michel, discovered that a clay layer occurring right at the Cretaceous–Paleogene (K-Pg) boundary was highly enriched in the element iridium.