And while we may take air conditioning for granted, it wasn’t that long ago — 1881, to be precise — when a team of naval engineers built a cooling contraption to comfort a dying President James Garfield. While the device — which blew hot air upwards and employed rags soaked in freezing water — could lower room temperatures by 20 degrees, it also ate up a quarter-million pounds of ice a month. (Think of all the Pina Coladas they could’ve made instead.)