Going Higher

CHARLES S. HOUSTON, M.D., began his study of the effects of high altitude as a naval flight surgeon in World War II; he conducted Operation Everest and Operation Everest II, acclimatization studies using compression chambers. DAVID E. HARRIS, PH.D., is Associate Professor at Lewiston-Auburn College, University of Southern Maine. ELLEN J. ZEMAN, PH.D., has written for and edited scientific and medical journals, encyclopedias, and books.