World's Greatest Mysteries

S1 E34: Crop Circles: Celestial Signs or Human Hoaxes?

Original Air Date: Nov 1, 2017

Investigating whether crop circles and reports of strange lights in the sky are hoaxes or celestial signs.

S1 E29: Spontaneous Human Combustion: Natural Phenomenon or Flaming Fiction?

Original Air Date: Nov 1, 2017

Investigating whether spontaneous human combustion is possible or an urban legend.

S1 E24: Mars: Barren Rock or Inhabited Civilization?

Original Air Date: Nov 1, 2017

Examining the chances of life on Mars and photographic evidence of what appear to be manmade structures.

S1 E23: Asteroid Collision: Doomsday Destruction or Passing Apprehension?

Original Air Date: Nov 1, 2017

Some experts say an asteroid impact doomsday scenario is science fiction while others think it's only a question of when, and whether Earth and humanity could survive.

S1 E22: Biblical Prophets: Amazing Accuracy or Coincidental Occurrences?

Original Air Date: Nov 1, 2017

Investigating whether ancient prophets really had the ability to foretell the future.

S1 E21: Dolphins: Stray Noises or Intelligent Communication?

Original Air Date: Nov 1, 2017

Studying the intelligence of dolphins and whether their noises are a form of communication.

S1 E13: Roswell UFO: Weather Balloon or Flying Disc?

Could this be the most shocking government cover-up of the 20th century?