Figuring out the cause of this seems a high priority.https://twitter.com/XiXiDu/status/1121423320552038400 …
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Replying to @typesfaster @robinhanson
What's the most powerful evidence for this being the main driver? Sperm count/testosterone down in the USA after controlling for age and weight.
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Replying to @Molson_Hart @robinhanson
No strong evidence, but https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3222987/ … Other possibilities include sunscreen, general sun avoidance, and kids not spending as much time outside, where they got tons of exercise.
1 reply 0 retweets 2 likes
Replying to @typesfaster @robinhanson
Interesting report: sunscreen https://www.menshealth.com/health/a19539973/i-put-a-giant-red-light-on-my-balls-to-triple-my-testosterone-levels/ …
1:36 PM - 25 Apr 2019
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