Chicxulub is a small town at the northern tip of Mexico's Yucatan Peninsula. We're not certain, but there are strong indications that a massive comet or asteroid struck the Earth in the seas near Chicxulub about 65 million years ago.
the K/T event, aka the Cretaceous/Tertiary Extinction; this marks the end of the dinosaurs' reign on earth (except for birds!)
Mesozoic and Paleozoic
Mesozoic
An asteroid impact
Mass extinction
mass extinction
Mesozoic
Mesozoic era
A mass extinction
a comet impacting the earth
Dinosaurs
mass extinction: When at least 50 % of the species on Earth go extinct within a relatively short amount of time.
Extinction did.