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We'll lose more species of plants and animals between 2000 and 2065 than we've lost in the last 65 million years. If we don't find answers to these problems, we're gonna be victims of this extinction event that we're at fault for.

With the advent of genetic engineering the time required for the evolution of new species may literally collapse.

Species go extinct because there are historical contraints built into a given body or a given design.

Most evolving lineages, human or otherwise, when threatened with extinction, don't do anything special to avoid it.

You look at the fact that for millions of years species on earth have been developing and we've been knocking them off at like a hundred a day.

As species are exterminated by shifting climate zones, ecosystems can collapse, destroying more species.

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 species every hour. That doesn't count the species whose populations are being reduced so greatly that diversity within the population is essentially gone.

You can cut a tree down, and it grows back. Once a species goes, it's gone forever.

Several times in Earth's history, rapid global warming occurred, apparently spurred by amplifying feedbacks. In each case, more than half of plant and animal species became extinct. New species came into being over tens and hundreds of thousands of years. But these are time scales and generations that we cannot imagine.

I accept extinction as best explaining disjoined species. I see that the same cause must have reduced many species of great range to small, and that it may have reduced large genera to so small, and of families.