By Denis Brian
By Cesare Emiliani
By Overbye, Dennis
By Barry R. Parker
By Steven Weinberg (University of Texas Austin)
By Chown, Marcus
By Stephen Hawking (University of Cambridge)
By Peter Atkins (Fellow of Lincoln College, University of Oxford)
By Brian Clegg
By Peter Collier
By Marcus Chown
By Robert Jungk
By Robert L Devaney
By K. A. Stroud
By Earl D Rainville / Phillip E Bedient
By Joseph Fourier
By Mark Kac
By N/A
By J.R.L. Hartley, D.L. Misell, Hartley, J.R.L., Misell, D.L.
By Carl Sagan
By Klaus Ziock
By H. Mulholland, C. R. Jones
By G R Noakes
By D. Betteridge