After six-year-old Adam Walsh was kidnapped and killed in 1981, his father John Walsh launched the show "America's Most Wanted" to prevent other parents from going through the same pain. Warning: This article contains graphic descriptions and/or images of violent, disturbing, or otherwise potentially distressing events. Adam Walsh’s murder went unsolved for over two decades. On July 27, 1981, six-year-old Adam Walsh went to a Sears department store in a Hollywood, Florida, mall with his mother.

The palace was razed by the Spaniards for materials and used to create a new home for Cortés nearby.INAHArchaeologists believe they found the floor of the palace’s main courtyard. The historic Nacional Monte de Piedad building in Mexico City appears to cover much more than low-interest pawn loans to those in need. As it turns out, the building actually stands on the remains of an Aztec palace. According to USA Today, the discovery occurred during an inspection by Mexico’s National Institute of Anthropology and History (INAH).

Unlike jellyfish, comb jellies don't have mouths that serve as both an anus and a mouth. Instead, it pushes its waste out through its epidermis when necessary, creating a temporary anus.Wikimedia CommonsA warty comb jelly called Sea Walnut at the Boston Aquarium, 2008. Comb jellies are among the most primitive forms of life on the planet today. Though they are as elegant and translucent as other jellyfish, comb jellies are actually a different animal entirely.

On June 25, 1876, Lieutenant Colonel George A. Custer led 210 men into an attack against 3,000 Sioux and Cheyenne warriors — and the Native Americans killed every last one of them.Charles Marion Russell/Library of CongressA 1903 lithograph depicting the Battle of Little Bighorn, the setting for Custer’s Last Stand. George Armstrong Custer lives on in American memory largely for one reason: his death. For generations, the account of Custer’s Last Stand has been legendary.

Dixon Dario Trujillo-Blanco learned the art of drug trafficking from his own mother at an early age — then he unintentionally helped authorities take his entire family down.“Cocaine Grandmother” Griselda Blanco may have been the head of her massive drug empire, but she wasn’t a monolith. She likely wouldn’t have become nearly as powerful if it weren’t for her family — especially her eldest son, Dixon Trujillo. DEAGriselda Blanco with her son, Dixon Trujillo.