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Astral Codex Ten Podcast

Feb 18, 2023 

Is Sperm Count Declining?

People say it is.

Levine et al 2017 looks at 185 studies of 42935 men between 1973 and 2011, and concludes that average sperm count declined from 99 million sperm/ml at the beginning of the period to 47 million today.

Feb 17, 2023

[apologies for an issue encountered when sending out this post; some of you may have gotten it twice]

Thanks to Chris Kavanagh, who wrote an extremely kind and reasonable comment in response to my Contra Kavanagh on Fideism and made me feel bad for yelling at...

Feb 15, 2023



I’ve been looking into the world of YouTube streamers; if you want to make it big, you need to have a beef with some other online celebrity. Fine; I choose Chris Kavanagh, who tweeted about...

Feb 15, 2023

In honor of Valentine’s Day, this installment of Mantic Monday will focus on attempted clever engineering solutions to romance. We’ll start with the usual prediction markets, then move on to other types of algorithmic and financial schemes. Normal...

Feb 13, 2023

[Remember, I haven’t independently verified each link. On average, commenters will end up spotting evidence that around two or three of the links in each links post are wrong or misleading. I correct these as I see them, and will highlight...