Readit Newsfrigidwalnut commented on Project Hyperion: Interstellar ship design competition projecthyperion.org... · Posted by u/codeulike
Are there two proposed bottlenecks, one at 900 kya and another at 70 kya? I'd only really heard about the latter.
The paper linked in that post proposes a bottleneck at 900Kya in the ancestors of all modern humans. There is a bottleneck associated with the migration out of Africa and the peopling of the world that many populations have, but not all. Based on genetic data the timing is between 100-50Kya, with a lot of the uncertainty coming from converting generation times to years (i.e. how many years on average between parents and offspring). This is a nice reference: https://sci-hub.se/https://www.nature.com/articles/nature213...
frigidwalnut commented on Project Hyperion: Interstellar ship design competition projecthyperion.org... · Posted by u/codeulike
The human population might have been reduced to as few as 1000 individuals at one point:
Follow up work has shown that result is a statistical artifact/does not replicate [1,2,3].
[1]https://academic.oup.com/genetics/article-abstract/229/1/iya...
[2]https://academic.oup.com/mbe/article/42/2/msaf041/8005733
[3]https://www.biorxiv.org/content/10.1101/2024.03.25.586640v1
This was old news decades ago[0] but people don’t want to hear it.
0: https://en.m.wikipedia.org/wiki/Mainstream_Science_on_Intell... an editorial written to tell the public that this is not some shocking, fringe claim. You can follow links from the page for the full text.
Thanks for that link. The Wikipedia article you referenced says "This view is now considered discredited by mainstream science."
There are still papers being written about how those analyses were flawed: https://www.pnas.org/doi/abs/10.1073/pnas.2319496121