Multiple choice

What percent of life went extinct at the time of the dino extinction 65.5 million years ago?

  1. 50%

  2. 70%

  3. 95%

  4. 99%

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Cretaceous-Paleogene extinction event, which wiped out the non-avian dinosaurs, resulted in the loss of approximately 70-75% of all species on Earth.