With billions of people walking on this planet, it's no surprise that we're all unique. And while we have many common features in our bodies, it's only natural that there are some that hold characteristics that are truly rare and different. But some of these differences are especially extraordinary on a biological level. From a rare blood type to additional ribs, and an immunity to sleep deprivation, you'd be surprised to learn that these body features actually exist.
Click on to discover some of the rarest bodily features very few people have.