Stricken with paralytic polio at the age of six in 1952, Paul Alexander is now one of the last people on Earth still living in an iron lung.

Leigh Occhi vanished in 1992 while staying home alone for the first time, and the only evidence police ever found was her blood-soaked nightgown and a mysterious package containing her glasses that arrived in the mail a few weeks later.

King Henry II was known to cut out the tongues of Protestants, but he faced a bloody death of his own when he was stabbed through the eye during a jousting tournament in 1559.

Lavinia Fisher owned an inn outside of Charleston, South Carolina, where some say she murdered hundreds of travelers before her arrest and execution in 1820.

Although 19-year-old Kevin Hines nearly severed his spine when he hit the water, he eventually recovered and now dedicates his life to suicide prevention.

A nocturnal primate found in Southeast Asia, the slow loris is one of the only venomous mammals on Earth — and they're on the brink of extinction.

Mark Winger beat his wife Donnah to death with a hammer just after they'd adopted a baby girl, but it wasn't until his mistress came forward three years later that police finally discovered the truth.

Christina Whittaker vanished without a trace from her hometown of Hannibal, Missouri in November 2009 — and her mother believes human traffickers may be to blame.

After Noela Rukundo's husband hired hitmen to kill her, they not only refused to do so — but they also gave her evidence of her husband's attempted murder.

In the 19th century, Lucretia Mott made her mark on America as a trailblazing abolitionist and suffragist — who demanded equal rights for all.

After his master John Gray died in 1858, Greyfriars Bobby spent the next 14 years guarding his grave, leaving just once a day to eat.