15 mai 66000000 av. J.-C. - KPG

Description:

leading to the extinction of the non-avian dinosaurs. About 75% of species on Earth disappeared.

Causes:
Asteroid Impact – A 10–15 km-wide asteroid struck near Chicxulub, Mexico, causing:
Massive wildfires and shockwaves.
A "nuclear winter" effect, blocking sunlight and disrupting photosynthesis.
Acid rain and drastic climate shifts.

Impact:
Non-avian dinosaurs and many large marine reptiles (e.g., mosasaurs, plesiosaurs) went extinct.
Marine Losses – Ammonites, some plankton, and many marine species perished.
Mammals & Birds Thrived – Small mammals and avian dinosaurs (modern birds) survived and diversified.

Ajouté au bande de temps:

Date: