By Ripley
By Russell Ash
By Daily Mail
By Eastaway, Rob
By Keaveny, Shaun
By Rhodes, Chloe
By Hensman, Jim
By DK
By Shenkman, Richard
By Strogatz, Steven
By Tibballs, Geoff
By Symons, Mitchell
By Pokémon
By Gifford, Clive
By Anon
By BBC
By Whitaker, Brian
By Johnny Ball
By Ben Crystal, Adam Russ, Ed McLachlan
By Celador
By Doug Lennox
By Reader's Digest
By Etter, D. M.
By Hoiberg, Dale H.
By The Week
By Mensa Ltd
By No Listed Author
By Eggheads
By Moore, Edwin
By Caroline Taggart, Taggart, Caroline