Quote by Elizabeth Kolbert

“In ordinary times—times here understood to mean whole geologic epochs—extinction takes place only very rarely, more rarely even than speciation, and it occurs at…

— Elizabeth Kolbert

For millions of years, on average, one species became extinct every century.... We are now heaving more than a thousand different species of animals…

— Douglas Adams

“Over the past 400 years, the extinction rate for mammals appears to be between 17 percent and 377 percent faster than normal.”

— Anthony D. Barnosky

“One of the great challenges in reconstructing a mass extinction is making sense of what happened when. In the same way we have divided…

— Bill Nye

“Over the past 400 years, the extinction rate for mammals appears to be between 17 percent and 377 percent faster than normal. Now, add…

— Anthony D. Barnosky

The extinction rate is so huge now, we're to the stage where we've got to set up recombinant ecologies. There are no longer enough…

— Bill Mollison

The fate of the vast majority of species on this planet has been extinction, eventually.

— Alice Roberts

Often extinctions in the ocean occur at the same time as those on land. Then again, the ice age extinctions lost many big animals,…

— Robert T. Bakker

It's a fair guess that at the rate we're destroying habitat, especially but not exclusively in the tropics, we're pushing to extinction about one…

— Donella Meadows

Every species we cause to become extinct we come closer to our own extinction

— Unkown

We find ourselves heading fully into an era of mass extinction.

— Severn Cullis-Suzuki

“They may not become extinct immediately, but being pushed out of decaying or destroyed habitats eventually takes its toll. The concept is known as…

— Craig Childs