By Fred Pearce
By Stephen Robert Miller
By Jenipher Changwanda and Freddie Clayton
By Jim Robbins
By Stefan Lovgren
By Matthew Kleiner
By Andrew S. Lewis
By Jill Langlois
By Jo Chandler
By Richard Schiffman
By Anthony Barnosky and Mary Ellen Hannibal
By Jonathan Mingle
By Christian Schwägerl
By Nicola Jones
By Isabel Hilton