Tracy and Holly talk about blood pressure and Diuril man. Holly then shares a story of how early fastener sales worked and how zippers have become specialized.
Stuff You Missed in History Class
2,268 clip(s)
Sir Humphry Davy and the Miner’s Lamp (Part 2)
Sir Humphry Davy and Nitrous Oxide (Part 1)
SYMHC Classics: S.S. Sultana