Of the sub-races of men, there are 17 known distinctions: Al-gemha, Al-hared, Bretons, Duraki, Horwalli, Imperials, Keptu, Kothringi, Men-of-ge, Nedes, Nords, Orma, Perena, Reachmen, Redguards, Rontha and Yespest. Men are said to be able to interbreed with Merfolk, but whether or not they are able to breed with Beastfolk is unconfirmed. One of the most significant differences men seem to possess is a shorter lifespan than most Mer, as they don't often live beyond 100 years. For example, the men of Skyrim tend to be relatively pale-skinned, while the Redguards of Hammerfell are dark-skinned. Men come in a variety of sizes, shapes and skin tones, often dependent upon the region they hail from. Lorekeepers among the Mer do not detail their origins, and men themselves have no record of their own origins. The origins of humankind are unknown, as there is no specific region of Nirn men came from. Their numbers are vast and, at times, overwhelming to the other races who populate the regions they occupy. Men, or humankind, is one of the predominant races in Tamriel.