Cretaceous–Paleogene extinction event

5 days ago - A wide range of terrestrial species perished in the K–Pg mass extinction, the best-known being the non-avian dinosaurs, along with many mammals, birds, lizards, insects, plants, and all of the pterosaurs. In the Earth's oceans, the K–Pg mass extinction killed off plesiosaurs and mosasaurs and devastated teleost fish, sharks, mollusks (especially ammonites and rudists, which became extinct), and many species of plankton.

The last non-bird dinosaurs were living at a time of environmental change, some of which began millions of years before they went extinct. The asteroid was the final, killer blow.

January 25, 2024 - An abrupt and global perturbation of the Earth System followed: the climate became unstable, the fine dust suspended in the atmosphere blocked sunlight, decreasing or even stopping photosynthesis.

Scientists refer to the major extinction that wiped out non-avian dinosaurs as the K-T extinction, because it happened at the end of the Cretaceous period and the beginning of the Tertiary period.

November 30, 2022 - End Cretaceous (65 mya) – the event that killed off the dinosaurs. Finally, at the end of the timeline, we have the question of what will come. Perhaps we are headed for a sixth mass extinction.

June 10, 2022 - Beyond that very irregular and ... still killed but with a slow gradient of less severity. Dinosaurs still existed far away from the impact years after the impact but the world climate was severely altered by the atmospheric results of the subsequent fires and initial dust and debris. It was a slow but steady catastrophe over the next many thousands of years. Populations of all large animals slowly died off and went extinct...

January 19, 2024 - New data suggests this extinction event was caused by a super-greenhouse climate driven by vegetation collapse. ... Research sheds new light on the catastrophic changes resulting from a burst of greenhouse gases and rising temperatures that ...

6 days ago - Proposed causes for the extinction of dinosaurs have included everything from disease, heat waves, cold spells, faunal changes, and an asteroid collision during the K–T boundary.

September 12, 2022 - On the other hand, the researchers say, the theories in favor of annihilation by asteroid impact hinge upon the Chicxulub impactor, a space rock that crash-landed into Mexico’s Yucatan Peninsula around the same time that the dinosaurs went extinct. “All other theories that attempted to explain what killed the dinosaurs got steamrolled when the crater the asteroid had gouged out was discovered,” says Keller.

February 24, 2021 - The asteroid impact led to the extinction of 75% of life, including all non-avian dinosaurs. Credit: Willgard Krause/Pixabay. AUSTIN, Texas — Researchers believe they have closed the case of what killed the dinosaurs, definitively linking their extinction with an asteroid that slammed into Earth 66 million years ago ...

Strong evidence suggests that a huge asteroid impact caused the mass dinosaur extinction 66 million years ago.

3 weeks ago - Crocodylomorphs, dinosaurs, pterosaurs, and mammals were left largely untouched, allowing them to become the dominant land animals for the next 135 million years. Plants were likewise significantly affected by the crisis, with floral communities undergoing radical ecological restructuring across the extinction event.

— Sixty-six million years ago, an asteroid the size of San Francisco crashed into a shallow sea off the coast of modern-day Mexico and plunged the world into an extinction event that killed off as much as 75% of life, including the dinosaurs.

Since iridium is more common in asteroids, they believed that a massive asteroid killed off all the dinosaurs, spreading a layer of asteroid particles worldwide to create the boundary layer. The only flaw they found in their paper is that they did not know where the crater was that caused the mass extinction.

You've probably heard how dinosaurs went extinct: They were all killed one terrible day when a huge object from outer space-a comet or asteroid the size of at least 100,000 Superdomes-slammed into Ear

February 20, 2024 - To our surprise, our team of nearly a dozen dinosaur experts—often an argumentative bunch—came to a clear consensus: as popular wisdom has it, the extinction was abrupt, and an asteroid was primarily to blame.

April 24, 2018 - Sixty-six million years ago, the world burned. An asteroid crashed to Earth with a force one million times larger than the largest atomic bomb, causing the extinction of the dinosaurs.

Closing in on the K-T boundary. ... Oct. 1, 2010 from Answers Magazine · A 41-member science panel has arrived at a verdict: an asteroid impact killed off the dinosaurs about 65 million years ago.

October 6, 2017 - The end-Cretaceous extinction is best known of the “Big Five” because it was the end of all dinosaurs except birds (the non-avian dinosaurs). It also created opportunities for mammals. During […]

Introduction | Asteroid Impact | Volcanism | Mammal Competition | Continental Drift | Conclusion · Hypothesis: Asteroid Impact