Walked into the jungle, the desert, or the fog, and never came back.

Three weeks before the demonstration that would have made him the undisputed inventor of cinema, he boarded a train and stopped existing.

Why did the most meticulous explorer who ever lived climb into a prototype flying boat to rescue a man he openly despised?

If a man dripping in diamonds dies owning only razors, combs, and a pair of sunglasses, where did the diamonds go?

If the world's greatest mystery writer vanished for eleven days and registered at a hotel under her husband's mistress's name, what exactly was she solving?

The FBI sent the fastest plane ever built to find him, and it was defeated by clouds.

He kept his route secret so no rival could reach the city first. More than a hundred people have since died trying to find him.