Semen quality and intelligence
Back in the 2000s, there was some interest in semen quality and intelligence: Arden, R., Gottfredson, L. S., Miller, G., & Pierce, A. (2009). Intelligence and semen quality are positively…
Heat and the great balls decline
OK, click baity title, but bear with me. In a prior post on Roman fertility decline, I had mentioned a speculative piece arguing that Roman fertility decline was in part…