by Danny Murphy
by Harold Klawans
by Arno Karlen
by Colin Tudge
by Erik Hoffmann
by C. David Belt
by Coloring Coloring Concepts Inc., Coloring Concepts Inc. Staff
by Lewis Thomas
by Michael Shermer
by Nikola Tesla
by William Wadsworth
by Peter Wepplo
by Jonathan Wells, Ray Braun
by Michael Windelspecht
by Jay P. Dolan
by Margaret Wertheim
by Jan Bondeson
by Julia Farish Spencer
by G. Wayne Miller
by Fred Alan Wolf
by Katie Hafner, John Markoff
by Susan Sheppard
by Carlton Jackson
by Kathleen Noftsier
by T. J. MacGregor
by John Manimas
by Gavin Williams
by Allen Williams
by Alan Gribben, Alan Gribben