That's what I'm saying. Historical changes to the climate have occurred, maybe with similar rapidity, maybe slower, and they caused huge extinctions. The best c

That's what I'm saying. Historical changes to the climate have occurred, maybe with similar rapidity, maybe slower, and they caused huge extinctions. The best case, I guess, is that the shift is slow AND life is hardier than we expected, and we get through it ok, maybe with just a few species disappearing. But the downside risk is the extinction of a huge swath of life on Earth. (The first species to go, historically, have been big animals with high metabolisms--things with similar volume/surface area ratios as us)