ADVERTISEMENT

Instant Egghead - Are We Facing the Sixth Mass Extinction?

According to the United Nations, we are losing about 200 species per day--a thousand times the normal background rate of extinction. How does this stack up to previous mass extinctions? Scientific American editor Fred Guterl explains.

Comments

You must sign in or register as a ScientificAmerican.com member to submit a comment.

EVERY ISSUE
EVERY YEAR
1845-PRESENT

Get All-Access Digital + Print >

X

Email this Article

X