"Khan!!!"

***shakes fist in air and overacts****

It's a genetic defect in the species. There are so many of them today because they were bred because of their defect. They were placed in flocks of sheep. When predators would attack the flock, the goats would get excited and pass out, allowing the sheep to escape while the predators consumed the helpless goat. Useful at one time and I'm sure they still are in certain parts of the world.

This makes me think of the graphic novel "Watchmen". The crater makes an appearance in a pivotal scene in that comic...