(February 12, 2017 at 12:42 am)popeyespappy Wrote:(February 11, 2017 at 3:17 pm)Jehanne Wrote: If planet wide temperatures hit 40 degrees C, it's all over with:
Yea I'm thinking 40 degrees C would be a problem since we've never seen an average annual global temperature in excess of 15 degrees C.
Eventually, it's destined to happen, regardless of what humans do:
https://en.wikipedia.org/wiki/Timeline_o...e_Universe
Some skeptics like to compare the far past (say, 50 million years ago) when temperatures were 10C higher than they are today; however, the Sun was dimmer, if only so slightly, back then, and so, it's difficult to say how close the Earth got to the tipping point of none of us existing.
