'..life on our planet -- and that is the only known life ... in the entire universe..'<blockquote>'The Earth is on the verge of a mass extinction event.
To understand how big of a deal that is you don't have to look much further than the definition of "mass extinction." It means that three-quarters of all species vanish -- forever.
In all of history, that's happened only five times.
The sixth extinction would be the first caused by humans.
"We are basically annihilating the life on our planet -- and that is the only known life ... in the entire universe," said Paul Ehrlich, Bing professor of population studies at Stanford University.'
- John D. Sutter,
How to stop the sixth mass extinction, December 12, 2016</blockquote>
Context<blockquote>
The extinction crisis'..Earth is warming more rapidly than previously thought was correct..'</blockquote>