Children pose with a skull of a Ovis polii, better known as the Marco Polo...

Children pose with a skull of a Ovis polii, better known as the Marco Polo sheep, in honor of the traveler who first wrote about it for a western audience, is known for its massive spiraling horns. With spans averaging 140 cm (55 in), the horns are prize Children pose with a skull of a Ovis polii, better known as the Marco Polo sheep, in honor of the traveler who first wrote about it for a western audience, is known for its massive spiraling horns. With spans averaging 140 cm (55 in), the horns are prized as trophies, but are also used for building fences. Wakhan Corridor, Afghanistan Photo by Michael Yamashita