By McTaggart, Lynne
By Pickover, Clifford A.
By National Geographic Society
By Skoyles, John, Sagan, Dorion
By Petersen, Carolyn Collins, Brandt, John C.
By Ferguson, Kitty
By Croswell, Ken
By Gratzer, Walter, W. B.
By Brown, Guy
By Adams, Fred
By Stewart, Ian
By Woolfson, Adrian
By Ridley, Matt
By Ferris, Timothy, Fadiman, Clifton
By Cohen, Jack S., Stewart, Ian
By Kitchin, C.R.
By Malone, John
By Altschuler, Daniel R.
By Shapiro, Robert
By Chapman, Allan
By Fairall, Anthony
By Kauffman, Stuart A.
By Faris, W.
By Livio, Mario
By Boulter, Michael
By Gardner, Dan
By Maddox, John
By Gärdenfors, Peter
By Evans, P G H, Peter
By Burkard Polster, Matthew Watkins, Matt Tweed, Gerard Cheshire, Lindi Houseman, Moff Betts