Happy birthday, Stephen Hawking!! "Next time someone complains that you have made a mistake, tell him that may be a good thing. Because without imperfection, neither you nor I would exist." . . . . . . . . . . . #stephenhawking #science #scientist #inspiration #hero #sciencehero #writer #nonfiction #sciencewriter #physics #space #birthday #onthisday #otd #hbd #happybirthday #life #mistakes #earth #knowledge #makemistakes #opportunity