On a fateful night in 1990, an arsonist lit a massive fire at the Happy Land Social Club in the Bronx — damning the 93 young people inside.

Ever since the end of World War II, allegations of Adolf Hitler's Jewish ancestry via his paternal grandfather have been the subject of intense debate. Here's what the actual evidence says.

From ancient Roman ruins overrun with cats to the "cat islands" of Japan, these cat havens are a must-see for cat people.

In March 1981, Marianne Bachmeier opened fire in a crowded courtroom and killed Klaus Grabowski — the man on trial for murdering her 7-year-old daughter.

After he learned that the Missouri chapter of the Ku Klux Klan was impersonating him in order to spread racist messages to kids, Mr. Rogers took them on — and won.

From 1977 to 1980, Joseph Paul Franklin traveled all over America to target victims who were Black or Jewish with a sniper rifle.

On November 8, 2017, a young Chinese man named Wu Yongning tried to do pull-ups off the side of a 62-story building. It was the last decision he ever made.

For more than 20 years, Michael Kent was a fervent white supremacist covered in hate tattoos. But that all changed when he met Tiffany Whittier and the pair struck up an unlikely friendship.

Known as "katsu ika odori-don," this bizarre delicacy showcases a freshly killed squid that "dances" when it's doused in soy sauce.

In November 1968, the White Panthers emerged as an anti-racist group that supported the Black Panthers.

Paleontologists said this dinosaur had a one-of-a-kind opening that was "shaped in its perfect, unique way."