CompellingProtagonis t1_ixgvw7g wrote
Reply to comment by Strange-Ad1209 in Do you agree with Stephen Hawking about Earth being unsustainable? by yaykarin
It doesn't need to swell into a red giant for the earths oceans boil away. The sun slowly burns hotter and hotter as the proportion of helium to hydrogen increases. When the sun first formed it was something like 75% the brightness, and has slowly increased in brightness.
Strange-Ad1209 t1_ixgw91a wrote
Yes but that may be an advantage for some of the life when Earth's orbit once again becomes more elliptical as it has done several times (3 periods of Snowball Earth over last 3 Billion years). Granted Humans won't like it or survive it above ground but many other forms of life, especially reptiles will absolutely love it. 8-)
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