The page references in these acknowledgements correspond to the printed edition from which this ebook was created.
Every effort has been made to trace the copyright holders of photos reproduced in the book. Copyright holders not credited are invited to get in touch with the publishers.
6: survivors of the crash of Uruguayan Air Force Flight 571 in the Andes greeting their rescuers, 23 December 1972: SIPA/Rex Features.
20: Juliane Koepke revisits the scene of the crash of LANSA Flight 508 in 2000: © Werner Herzog Film.
34: John McDouall Stuart, engraving, 1865: Granger Collection/TopFoto.
48: James Riley, engraved frontispiece from his book, An Authentic Narrative of the Loss of the American Brig Commerce, Wrecked on the Western Coast of Africa, in the Month of August, 1815…, 1817.
62: Steven Callahan: courtesy Steven Callahan, author of Adrift, Seventy-Six Days Lost at Sea.
76: Thor Heyerdahl climbing the mast of Kon-Tiki, June 1947: Getty Images.
90: Jan Baalsrud, May 1954: Associated Newspapers/Rex Features.
106: Louis Zamperini climbing out of his bombardier hatch, January 1943: © Bettmann/Corbis.
120: Alistair Urquhart as a young soldier: Fotopress, Dundee.
132: Nancy Wake, June 1945: AP/Press Association Images.
146: Tommy Macpherson when with 11 Comando: © National Museums of Scotland.
160: Bill Ash, 1941: photo from Under the Wire courtesy Bill Ash.
174: Edward Whymper in climbing gear, mid-1860s: Getty Images.
186: George Mallory (left) and Andrew Irvine at base camp in Nepal preparing to climb the peak of Everest, June 1924: AP/Press Association Images.
198: Toni Kurz, shortly before the accident, July 1936 and hanging from a rope, 23 July 1936.
212: Pete Schoening climbing the Lighthouse Tower in the Cascade Mountains, Washington, 1949: Bob and Ira Spring Photographers.
224: Joe Simpson climbing in the Peak District, April 1989: Time & Life Pictures/Getty Images.
238: Chris Moon running the Badwater 135 ultra-marathon in Death Valley, 15 July 2013: Getty Images.
252: Marcus Luttrell, Afghanistan: US Navy Photo.
266: Aron Ralston revisits Canyonlands National Park, September 2010: Fox Searchlight/Everett/Rex Features.
280: Sir John Franklin, 1845: Scott Polar Research Institute, University of Cambridge.
292: Captain Robert Falcon Scott during the Depot Laying Journey to the Great Barrier, 1911: Popperfoto/Getty Images.
306: Roald Amundsen, c. 1911: Getty Images.
320: Douglas Mawson, on a later more successful expedition to Antarctica, claiming Proclamation Island for the Crown, January 1930: Popperfoto/Getty Images.
334: Ernest Shackleton, 1908: Getty Images.