Though it's most often associated with the Vikings, the drinking horn has a long history that actually started more than 1,000 years before the vicious warriors ever left Scandinavia.

On the morning of February 27, 2012, T.J. Lane opened fire inside the cafeteria at Chardon High School, killing three students and wounding three others — while wearing a sweatshirt emblazoned with the word "killer."

Eben Byers began drinking radium-infused water that his doctor prescribed for an arm injury in 1927 — but within three years, his bones were disintegrating.

It may be only an inch long, but the bullet ant has an excruciating sting that leaves victims in agony, including temporary paralysis and hallucinations.

With its enormous ears and stilt-like legs, the maned wolf is a one-of-a-kind animal that roams the plains of Brazil and Argentina.

The Tommy gun was intended to be a military weapon, but as organized crime skyrocketed during Prohibition and the Great Depression, it soon became the firearm of choice for gangsters like Al Capone.

Erin Corwin thought her lover Christopher Lee was going to propose to her on June 28, 2014 — but instead, he strangled her and threw her down a mine shaft near Joshua Tree National Park.

Rich plantation owners in the 1880s were so desperate to combat the rats eating their sugarcane that they brought the mongoose to Hawaii — and the government still can't get rid of them to this day.

From murderers being captured to missing children being reunited with their parents, explore some of the most baffling cases that were solved after Unsolved Mysteries aired episodes about them.

Samantha Koenig was just 18 years old when serial killer Israel Keyes kidnapped and murdered her in Anchorage, Alaska — before sewing her eyelids open for a chilling "proof of life" photo.