The ailment is known as chimerism. It basically means that you have an additional set of DNA that can cause heterochromia, or colored eyes or mosaic skin. The condition is entirely safe. Due to the lack of antigens, the blood type is extremely uncommon. The blood can be given to anyone, and it has superior healing abilities to other substances. Only 40 people worldwide have this blood type, and only 9 of them actively donate blood. Additionally known as palmaris longus. In essence, it was a muscle that enabled our forefathers to scale trees. Some people still possess it even though we no longer use it. It can be used if someone needs a tendon graft, but otherwise it serves no purpose whatsoever. Put your arm flat on a surface, touch your thumb with your pinky finger, and if you have it, it will pop out of your wrist. This issue or blessing affected people like Winston Churchill, Margret Thatcher, and Nicolas Tesla. The DEC2 gene essentially enables a person to complete a sleep cycle faster than the majority of us. It makes sense that some people took advantage of the extra time to succeed. You become somewhat superhuman as a result. Your skin is less prone to aging, and your bones are incredibly strong. A person with this condition will, however, also likely experience problems with joint replacement as they age. It serves as evidence that all living things once had gills. This is only possessed by 5% of the world’s population. Once more, it serves no purpose and is not hazardous. It’s merely a hole close to your ear. Perhaps you could use it for a second piercing (but don’t!) The term for it is preauricular sinus.