He failed his PhD exam and NASA rejected him 3 times. Advice on perseverance from a guy who overcame all odds to become an astronaut

Business Insider Astronaut and "Spaceman" author Mike Massimino has made two trips to space, one of which was spent servicing the Hubble Space Telescope. Heput his odds at achieving his dream career at .0000001. "Remember that thingsmight be improbable, or really difficult, or unlikely. But they're not necessarily impossible." In this interview with Business Insider, he revealswhat inspired him to become an astronaut and offers his advice on how you might achieve any goal in life. Follow BI Vide...