NASA reveals how big the Asteroid that killed dinosaurs, destroyed Earth, actually was

tech.hindustantimes.com:

It was not the first time an asteroid had hit Earth and it was not the largest asteroid to hit Earth. However, somehow, this was the asteroid that killed dinosaurs and destroyed Earth a long time ago. For decades, scientists had been working to find out how dinosaurs went extinct? Back in the 19th and early 20th century, there were some interesting theories ranging from toxic volcanic gasses to food shortage. However, evidence has shown definitively that it was an asteroid strike that wiped the entire dinosaur species from the planet Earth. What exactly was this evidence, how large was the asteroid that hit Earth and killed dinosaurs? These are still important questions to which we must know the answers in order to understand and prepare against any future threat. Well, thanks to NASA, we do know the answers to how large the asteroid that killed dinosaurs and destroyed the Earth was. Read on to find out more.

Dinosaurs first appeared during the Triassic period, between 243 and 233.23 million years ago, although details around their origin is still a hotly debated topic. Interestingly, based on fossil records, birds are actually feathered dinosaurs who have evolved from theropods and are the only lineage of dinosaurs to survive the asteroid strike-fueled extinction. This extinction event took place around 66 million years ago and is known as the Cretaceous–Paleogene (K-Pg) extinction event.

The Cretaceous-Paleogene (K-Pg) extinction event refers to the sudden mass extinction of dinosaurs, particularly non-avian dinosaurs. Around 66 million years ago, an asteroid hit the surface of Earth and caused instant demise for a large population of dinosaurs. Although NASA does not know where the asteroid originated from, we do know