dummies manning be upcoming a ryan flight will be wearing such a vest for test purposes for physicists bagga header and so has mission is a unique opportunity. consequence like your concern is of course in a word it's cool that we're through it so much fun of putting this interim back to it's great to see us being able to send helga and so hard to the moon and bring them safely back to earth for but we don't think you're going to. so exposure to lots of radiation means the risk of getting cancer is high if humans wanted to colonize space they would need a lot more than sunscreen. but what conditions are required for any form of life to emerge and survive whether here or elsewhere. that's the subject of a question submitted by one of our viewers. which planets other than earth could support life. our planet is home to a remarkable diversity of life. life as we humans define it requires certain conditions to develop and flourish. it takes a combination of numerous factors for life to form. for billions of years the light emitted by the sun has provided a stable environment for life. the earth

>> he has stop and frisk bagga baggage, baggage as the mayor, he had a few botched commercials at least am virginia. you see him with barack obama all the time. he's trying to establish he's cooperating with him. and, so, i think he's trying to, i think he's going to have a unique advtage, completely tested with those 15 or 16 states on super tuesday, he's going to be able to spend a lot on each one of them. >> woodruff: and he suggests, mark, that he's in his -- whenever you see him making a tspeech, every time he's there, he's prepared to go toe to toe with president trump. >> yes. in a strange way, i think that'd one to have the fewer mistakes he's made. vs. trump ra.not want a trump they don't want an insult race. i think one of the greater appeals of pete buttigieg in this entire campaign is he lowers the emotional thermostat in the room, that he speaks reasonably. coming back to michael bloomberg, judy, you're absolutely right, i've never seen anybody spin like this before, but his campaign has been totally controlled. he's never mixed it up. now he might not even go to the debate