“The World Stands on its Head” (“Die Welt Steht Kopf”) House on the Baltic Sea Island of Usedom stands nearly completed on September 3, 2008 in Trassenheide, Germany. The upside down house, complete with upside down interior furnishings, is the brainchild of Klaudiusz Golos and Sebastian Mikiciuk, and will become a local tourist attraction. (Photo by Sean Gallup/Getty Images)

Musicians from the Academy of Contemporary Music play using instruments made of car parts during a photocall on April 16, 2008 in London, England. Ford's unique orchestra made up entirely of Ford Focus car parts. (Photo by Daniel Berehulak/Getty Images)

A cook grills chicken during the Festival des Grillades, in the yard of the Culture Palace of Abidjan, September 5, 2015. The two day festival was iniated in 2008 to promote Ivorian cuisine, which revolves around grilled food. (Photo by Luc Gnago/Reuters)

A 500-pound lion and an 11-pound dog have formed an unlikely friendship, proving that cats and dogs really can get along. Bonedigger the lion and Milo the dachshund live together at Garold Wayne Exotic Animal Park in Wynnewood, Okla., along with three other dogs. The puppies were introduced to Bonedigger in 2008 when he was just a 4-week-old cub.

In this handout image provided by Perth 2011, HMB Endeavour, the replica of Captain James Cook's ship, is farewelled from Sydney Harbour accompanied by three Olympic class Laser yachts on April 16, 2011 in Sydney, Australia. The ship was farewelled from Sydney to start her circumnavigation of Australia, ending up in Freemantle where she will play a role in the Perth 2011 ISAF Sailing World Championships in December. (Photo by Richard Palfreyman/Perth 2011 via Getty Images)

“Photoswapped: Mum and dads switch heads with their children in freakiest photos you'll ever see. It is a position that many young children would love to be in. And now these strange and sometimes unnerving images show what it would actually be like if babies swapped roles, and heads, with their mother or father. The photos, created by top advertising photographer Paul Ripke, are so eye-catching that they have swept across the world online”. (Photo by Paul Ripke/Barcroft Media via Fame Pictures)

Schwarzenegger began weight training at the age of 15. He won the Mr. Universe title at age 20 and went on to win the Mr. Olympia contest seven times. Schwarzenegger has remained a prominent presence in bodybuilding and has written many books and articles on the sport. Schwarzenegger gained worldwide fame as a Hollywood action film icon. He was nicknamed the "Austrian Oak" and the "Styrian Oak" in his bodybuilding days, "Arnie" during his acting career and more recently "The Governator" (a portmanteau of "Governor" and "The Terminator" – one of his best-known movie roles).

Viking re-enactors representing the rival armies of the Vikings and Anglo-Saxons skirmish near Clifford’s Tower during the Jorvik Viking Festival on February 23, 2019 in York, England. The annual Jorvik Viking Festival held in York is recognised as the largest event of its kind in Europe. This year the festival remembers the role that the Viking women played during those turbulent times. (Photo by Christopher Thomond/The Guardian)