By Ailsa Allaby, Michael Allaby
By David Baxter
By George Musser
By Frank Close
By Lliffe, Robert
By Charles Frankel
By Stephen Hawking (University of Cambridge)
By Sean Carroll
By Nirmala Nataraj, NASA, Bill Nye
By N.M.J. Woodhouse
By Jeremy Gray (Senior Lecturer in Mathematics, Senior Lecturer in Mathematics, Open University)
By Ta-Pei Cheng
By Hoskin, Michael
By Moore, CBE DSc FRAS Sir Patrick
By Rubenstein, Mary-Jane
By Ridpath, Ian, Tirion, Wil
By Tim Furniss, Furniss, Tim
By Lemonick, Michael
By Fraser, Gordon
By Brown, Robert A.
By Day, Robert A., Gastel, Barbara
By Nelson, Craig
By Blundell, Stephen J., Katherine M.
By James Reston, Reston, James
By Moore, Patrick
By Sobel, Dava
By Duncan, David Ewing