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In the oceans, the K–Pg extinction killed off plesiosaurs and mosasaurs and devastated teleost fish, [27] sharks, mollusks (especially ammonites, which became extinct), and many species of plankton. It is estimated that 75% or more of all species on Earth vanished. [28]
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.
"A New Timeline of the Day the Dinosaurs Began to Die Out – By drilling into the Chicxulub crater, scientists assembled a record of what happened just after the asteroid impact". The New York Times. Archived from the original on September 25, 2019
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.
A six-mile-long asteroid, which struck Earth 66 million years ago, wiped out the dinosaurs and more than half of all life on Earth.The impact left a 124-mile-wide crater underneath the Gulf of ...
Roy Lee Moodie proposed that dinosaurs were killed off by diseases. [7] Examples of the pathological health conditions Moodie thought contributed to the extinction of the dinosaurs included arthritis, dental cavities, fractures, and infections. [19] 1925. Paleobotanist George Wieland hypothesized that Tyrannosaurus rex survived on a diet of eggs.
"So the one that killed the dinosaurs is really special in two ways — by what it did, and also by where it originated." This apocalyptic object is what created the Chicxulub crater on Mexico’s ...
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.