Christophe Courteau / Kalahari bushmen, family group playing skipping game, Central Kalahari Desert, Botswana, August 2008

Jeff Vanuga / Silhouette of two cowboys playing cards and drinking in a wagon, Wyoming, USA, September 2006, Model released

Mark Taylor / Two Maine Coon kittens looking at an image of a mouse on a laptop computer.

Jabruson / Hot air balloon over Taita Hills Game Lodge, Kenya

Juan Carlos Munoz / People playing Xiangqi, also called Chinese chess, Green, Lake Park, Kunming, Yunnan, China, Asia

Jen Guyton / Two young men play a game called Bao in the back alleys of a marketplace in Lilongwe, Malawi.

Jen Guyton / Two young men play a game called Bao in the back alleys of a marketplace in Lilongwe, Malawi.

Kristel Richard / Two eagle hunters mounted on Mongolian horses in tug of war game over dead goat during the Buzkashi games, at the Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..

Kristel Richard / Eagle hunter woman whipping man on slow Mongolian horse to try to slow him down during game at the Eagle hunter's festival. She is on a faster horse but if he wins the game he is entitled to a kiss....

Kristel Richard / Two eagle hunters mounted on Mongolian horses in tug of war game over dead goat during the Buzkashi games, at the Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..

Kristel Richard / Two eagle hunters mounted on Mongolian horses in tug of war game over dead goat during the Buzkashi games, at the Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..

Kristel Richard / Eagle hunter mounted on Mongolian horse winning Buzkashi game after winning tug of war over dead goat, at the Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..