Four MIT professors and six MIT alumni were elected to the National Academy of Sciences this past Tuesday, May 1. This election brings the total number of MIT faculty members who are part of the Academy to 78, and the number of MIT affiliates — emeritus and former faculty, current and former staff, and alumni — to 199, according to a press release from the MIT News Office. Membership honors those who have made significant contributions in original research. In total, 84 new members and 21 foreign associates were elected this year.