Nature Quote by Daniel J. Levitin

“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

When the first humans reached Australia about 45,000 years ago, they quickly drove to extinction 90% of its large animals. This was the first…

— Yuval Noah Harari

“It’s important to keep in mind that when viewed against the full scale of our species’ existence, ten thousand years is but a brief…

— Christopher Ryan

When I arrived on the planet, there were only two billion. Wildlife was more abundant, we were less so; now the situation is reversed.

— Sylvia Earle

We are already eating less animal foods since a few years ago, but we are still eating 8-9 billion animals per year.

— Mark Bittman

“Earlier than about 10,000 years ago, all human populations were hunter gatherers. Soon, probably none will be. Those not extinct will be 'civilised' —…

— Richard Dawkins

“Of the many species that have existed on earth--estimates run as high as fifty billion--more than ninety-nine per cent have disappeared. In the light…

— Elizabeth Kolbert

We, Homo sapiens, destroyed the majority of the large mammalian species in North America and Australasia just over 10,000 years ago. We, Homo sapiens,…

— Michael Smith

“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

“For the entire course of evolution leading from our primitive mammalian forebears of a hundred million years ago to the single lineage that threaded…

— Edward O. Wilson

“The last 10,000 to 20,000 years have witnessed a period of dramatic growth in human civilization. Indeed, our growth during this time is unique…

— Heidi Cullen

“Timeline of History Years Before the Present 13.5 billion Matter and energy appear. Beginning of physics. Atoms and molecules appear. Beginning of chemistry. 4.5…

— Yuval Noah Harari