What happened next when the Dinosaurs went extinct?

It's been years since the dinosaurs went extinct, but what exactly happened?
Kurzgesagt has released a new video, and this time it's about the dinosaur extinction.

It's frightening how an entire era disappeared in a blink of an eye.
It's even more frightening to think the same, will happen to humanity.

66 million years ago, maybe on a Tuesday afternoon, life was the same as it had been the day before or a thousand years before or pretty much a million years before.

Things were good for our feathered dinosaur buddies. Until a tiny, tiny detail in the sky changed.

Sources & further reading: Kurzgesagt – In a Nutshell