All 22 members of the National Science Board were terminated by the Trump administration via a terse email Friday. The administration has provided no explanation for purging the board, which helps steer the National Science Foundation and acts as an independent advisory body for the President and Congress on scientific and engineering issues, providing reports throughout the year. The ousters represent another severe blow to the NSF and the overall scientific enterprise in America. On Friday, members received a two-sentence email saying that, “On behalf of President Donald J. Trump,” their positions were “terminated, effective immediately.” Keivan Stassun, a professor of physics and astronomy at Vanderbilt University and director of the Vanderbilt Initiative in Data-intensive Astrophysics, was among those terminated.…