While these fuzzy horns and reindeer face might look like Santa's reindeer, they don't fly. Early mail in Alaska was delivered by reindeer. Reindeer herding covers a staggering 1/4 of the Earth. While Alaska has temperatures reaching 35 degrees below zero, reindeer eat moss to keep warm. Like the snowflakes, all of the reindeer's horns are different no two are the same. Especially in Alaska, when snow piles up reindeer need to find food. They have a 2-foot sensing system built into them. They can feel food up to two feet below the snow.