By Kennedy Phiri and Freddie Clayton
By Michael Gerrard
By Sofia Quaglia
By Rebecca McCarthy
By Fred Pearce
By Nicola Jones
By Christian Schwägerl
By Richard Schiffman
By Elizabeth Kolbert
By Zach St. George
By Lela Nargi
By Isabel Hilton
By Murat Yazar / Text by Paul Salopek
By Jonathan Mingle
By Tom Philpott
By Jim Robbins