by Barry Dainton
by Tom Sparrow
by American Geriatrics Society (AGS), Health in Aging Foundation, American Geriatric Society Staff
by Carl Sheperis, Robert Drummond, Karyn Jones
by McCarthyMichael, Felicity O'Dell
by Tremper Longman
by Fraser MacBride
by Carl Sagan
by Bernardo Kastrup
by T. D. Stanley, Hristos Doucouliagos
by Walter A. Brogan
by Bodhidharma, Red Pine
by Sally Wiggins
by Steven Cahn, Maureen Eckert
by Andrea Lavazza, Howard Robinson
by Eduardo Gill-Pedro
by Christopher Gregory Weaver
by Annalisa Rellie, Rudolf Abraham
by El�mire Zolla
by Sean Enda Power
by Mark Okrent
by Ashley Marshall, John Barrell, Ann Bermingham, Robert Folkenflik, Robert D. Hume
by Raphael Neelamkavil, Saju Chackalackal
by Jim Slagle
by Susanne M. Klausen
by James A. Harris
by Jonathan Head
by Kim Dwinell
by Michio Kaku
by Justin Remhof