Biathlon is a winter sport combining cross-country skiing with rifle marksmanship. The sport is rooted in the skiing traditions of Scandinavia, where early inhabitants revered the Norse god Ull as both the ski god and the hunting god. Ulls goddess wife Skadi was also celebrated as a hunter-skier.
The growth of the sport was aided by its inclusion as a demonstration event at the first Winter Olympics, held in Chamonix, France, in 1924. The first annual world championship for the biathlon took place in 1958. The biathlon was added to the Winter Olympics program as an official event for men in 1960. International biathlon competitions for women were first held in 1981; a world championship was established three years later.
Read more in Wikipedia