We're all fascinated by that eerie feeling that goes along with tales of unexplained sightings and people who vanish without a trace. Here are some of "Unsolved Mysteries'" most enduring puzzles.

Saddle up, because the Wild West was full of secrets that history couldn't bury! Join us as we count down the most jaw-dropping mysteries from the days of outlaws, lost treasures, and unsolved crimes ...

The magnum opus of particle physics is far from complete, requiring physicists to devise many alternatives—some weirder than ...

The best mystery shows are the ones that use every scene to piece together its story, as seen in series like Severance, Death ...