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The dangerous playgrounds of 1900s through vintage photographs https://news.ycombinator.com/item?id=31855163 https://news.ycombinator.com/item?id=31855163 May

by memcg 4y ago

The dangerous playgrounds of 1900s through vintage photographs https://news.ycombinator.com/item?id=31855163 https://news.ycombinator.com/item?id=31855163 Maybe this explains all the "You Probably Have Less Testosterone Than Your Grandfather (and Grandmother??) Did" claims.