News Headline

Five Mass Extinctions Wiped Out 99 Percent Of Species That Ever Lived—Are We Headed For The Sixth?

Source
Newsweek

Publication Date
2017-06-30

This article was originally published on The Conversation. Read the original article. Of all the species that have ever lived, more than 99 percent are now extinct. Most of them quietly disappeared during periods of “background extinction,” whereby a handful of species become extinct every 100,000 years or so.

Content
http://www.newsweek.com/five-mass-extinctions-earth-history-630314