Philosopher's mummified head put on display, St. Nicholas' grave found, possible Mona Lisa prototype identified, human radiation experiments revealed, "Band of Brothers" vet laid to rest.

From his stage presence to his fashion, Tom Petty electrified audiences for decades. These photos explain why.

Experts now seek to find out whether this sketch was the precursor to da Vinci's iconic painting.

Inside America's devastating, decades-long propensity for gun violence on a massive scale.

Devastating photos of what is now the deadliest mass shooting in American history.

From Stalin to Hitler to Lincoln, these famous photoshopped photos will make you question history.

The Civil War was about just one states' right: the right to own slaves.

Uncover the dark side of "America's royal family" with these facts about the Kennedy family.

Inside the humiliating impotence trials of Renaissance Europe.

Viking sword found, "Excalibur" mystery solved, lost languages uncovered, Hitler's sexual bloodlust revealed, St. Peter's bones possibly dug up.