Why are dinosaurs extinct? Let me google that for you.
Let’s clear something up right away. Dinosaurs aren’t extinct. Not entirely. Every magpie, pigeon, penguin, and ostrich alive today – every single bird – is a dinosaur. They’re all descendants of small, toothy, feathery dinosaurs that hopped and fluttered around from the Jurassic era onwards, meaning that birds are dinosaurs in the same way that bats are mammals. The Archaeopteryx laid out under glass at London’s Natural History Museum was the first of its ilk, and the only reason today’s birds seem so different is because the last of their close dinosaurian relatives trailed off into extinction about 66 million years ago.