 The archaeological evidence traces goat domestication as far back as 10,500 years Before Present, and DNA evidence suggests 10,000 years BP.The bezoar ibex is known particularly for the size of its horns; they possess the world's longest horns in relation to body weight.Bezoars average about 60 kg (140 pounds) and their horns can grow as long as 1.5 m (55 in).