NASA was interviewing professionals to be sent to Mars. Only one person could go and he will not return to Earth. The first applicant, an engineer, was asked how much he wanted to be paid for going. “A million dollars”, he answered, “because I wish to donate it to M.I.T.” The next applicant, a doctor, was asked the same question. ]He asked for two million dollars. “I wish to give a million to my family, he explained, “and leave the other million for the advancement of medical research.” The last…