Mark Clampin (center), director of NASA's astrophysics division, will serve as acting deputy associate administrator of science for the next year. Credit: NASA GSFC/Rebecca Roth WASHINGTON — ...

SCIENCE CHIEF: NASA has named S. Alan Stern the new head of the agency's Science Mission Directorate, effective April 2. Stern will succeed Mary Cleave, who is retiring. Stern joins NASA from the ...