Good: A couple of smart guys talking about things. Great: It's Randall Munroe and @Cmdr_Hadfield. https://t.co/FGSHoSR53F
— Phil Plait (@BadAstronomer) November 28, 2015
Good: A couple of smart guys talking about things. Great: It's Randall Munroe and @Cmdr_Hadfield. https://t.co/FGSHoSR53F
— Phil Plait (@BadAstronomer) November 28, 2015