Tweet from PennNETS
RT @neiltyson: His passing has left an intellectual vacuum in his wake. But it’s not empty. Think of it as a kind of vacuum energy permeati… March 15, 2018, 3:39 pm
RT @neiltyson: His passing has left an intellectual vacuum in his wake. But it’s not empty. Think of it as a kind of vacuum energy permeati… March 15, 2018, 3:39 pm
