Meet the 50 Real-Life X-Men Who Will Leave You in Awe

There is a mutation that causes bones to become eight times denser than normal, allowing people to walk away from car accidents without a single fracture but with the trade-off of being unable to swim.

A rare mutation among the Bajau people in Southeast Asia lets them stay underwater longer. Natural selection at the PDE10A gene has made their spleens bigger, so they can store more oxygenated red blood cells.

Genetic mutations among Tibetans help them to live and work on the Qinghai-Tibetan Plateau, which features elevations as high as 14,800 feet. They can withstand low levels of oxygen and limited access to food. One of these variants was inherited from an extinct group of humans known as the Denisovans, a sister species to the Neanderthals.

Scientists have found that Ozzy Osbourne's genes have unique mutations that make his body more resistant to the effects of hard drugs and too much alcohol. One scientist quipped that the "genes connected to addiction, alcoholism... all had unique variations in Osbourne, a few of which geneticists had never seen before."

About 1 in 200 Icelanders and Scandinavians have a change in a gene linked to Alzheimer's disease that protects them from both the disease and normal cognitive decline.

Guevedoces are genetic males in a small community in the Dominican Republic who are born with a vagina instead of a penis. At puberty, their vagina fuses into a fully-functioning penis and scrotum.

There is a man named Matthias Schlitte who has a rare genetic defect that makes his right arm 33% bigger than the other, and it has been nicknamed Hellboy Arm.

A man living in the 1700s named Tarrare had an endless appetite due to unknown causes. In one case, he ate 15 meals in a single sitting, and his endless hunger led him, while in a hospital, to eat piles of garbage, as well as try to drink other patients' blood and eat corpses from the morgue.

Veronica Seider is a German woman who was born with superhuman eyesight. She can see people a mile (1.6 km) away and tell who they are.

The Pauli effect is a term referring to the anecdotal failure of technical equipment in the presence of Austrian theoretical physicist Wolfgang Pauli. Once, he wasn't there when something broke. This seemed to disprove the jinx until his coworkers found out that Pauli was on a train right by the lab when the machine broke.