On April 8, 1974, Atlanta Fulton-County Stadium was packed with a record 53,775 fans as Hank Aaron hit career home run No. 715 in the fourth inning off of Los Angeles pitcher Al Downing, surpassing Babe Ruth as the game’s all-time leader in home runs. (Walter Iooss Jr./SI)

GALLERY: Hank Aaron Retrospective


A bit of a detour into neuroscience today with a look at the chemical structures of some of the major neurotransmitters in the brain. Inspired in part by this post on the chemicals related to various emotions.

All available to download as free A3 PDFs at the bottom of the accompanying post (