Swansong Biospheres II: The final signs of life on terrestrial planets near the end of their habitable lifetimes · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/1310.4841/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTSwansong Biospheres II: The final signs of life on terrestrial planets near the end of their habitable lifetimes — mentioned by Retrichttps://news.ycombinator.com/item?id=34385465urn:hackerpapers:mention:1310.4841:34385465Sun, 15 Jan 2023 00:20:00 GMT<p>Eventually the oceans will boil, but wikipedia links to paper evaluating the atmosphere in “1 Gyr and 2.8 Gyr from present” or 1 to 2.8 billion years not 500. It’s suggesting that life should stick around on earth for ~2.8 billion years though the total number of living cells will noticeably start to decline at 1 billion years. https://arxiv.org/abs/1310.4841 In general it would take a very large change in the suns output to make a noticeable difference on earth. There are critical secondary effects and feedback loops etc, but black body radiation is T^4 so you take the square root of the…</p><p><a href="https://hackerpaper.kaipfister.de/p/1310.4841/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.EP