Approximately what percentage of the world's extinct species became extinct before humans appeared on earth?

Question

Quizplus · Accepted Answer

Scientists estimate that over 99% of species that ever existed on Earth are now extinct, and the vast majority of these extinctions occurred before humans evolved. Only a tiny fraction of extinctions can be attributed to human activities, such as deforestation, habitat destruction, and hunting.

Approximately What Percentage of the World's Extinct Species Became Extinct