By Jim Pipe
By Van Riemsdijk, J. T. & kenneth Brown.
By D. Elliot
By Horace Herring
By E. Taylor
By R. Roy
By G. Holden
By Matt Whyman
By W.Edward Allen
By A. David Weaver
By David James Bell, B. M. Freeman
By Jordan, D.W., Smith, P.
By Neal Stephenson
By Conrad Dixon
By Rachel Botsman
By Jim Motavalli
By Ryder, John Douglas
By Donald Hill
By Myers, Warren
By Chris Peterson
By Tom Bartlett
By The Science Museum
By Adam Gazzaley (Professor, University of California, San Francisco), Larry D. Rosen, PH.D. (Professor, California State University, Dominguez Hills)
By Andrew W. Speedy
By Allan Fraser, J.T. Stamp
By John Bryn Owen
By Edward Hart