World's Greatest Mysteries

An asteroid strike? Massive global volcanic eruptions? A worldwide flood? Dinosaurs suddenly became extinct 65 million years ago. The cause of this mass extinction has been extensively studied with no definitive explanation. What really happened?

For thousands of years man has asked is Mars inhabited? The canals: Evidence of a past civilization? The 'face' visible on the Cydonia region? Are the pyramid shapes on Mars connected to the Pyramids on Earth? What are the secrets of the Red Planet?

This TV special interviews a man, who, as a teenage science prodigy, was allowed into the Area 51 base. He relates an amazing account of science and engineering far advanced from any known on earth.

There have been 9,000 crop circle sightings in the last 30 years globally. Are these increasingly complex designs the result of microwave emissions?

What are the dancing lights and flames in the sky documented by Christopher Columbus in the ocean area called the Devil's Triangle? Where does the green fog come from?

Where did the inhabitants of Easter Island come from 1700 years ago? Is the answer hidden in the hieroglyphics found on the island's legendary 'talking boards' of the islanders Rongorongo language that no scholar has been able to decipher or translate?

The Pyramids of Egypt are among the largest structures ever built. Archeologists and researchers have determined ancient Egypt lacked the tools and skills required to build the pyramids.

Clearly some crop circles are hoaxes. Others are inexplicable, with no evidence of human activity. This program asks why do crops undergo changes at the cellular level and what are the strange lights seen over the fields where crop circles are found?

Humanity is under attack from the most dangerous insects to ever inhabit Earth. This program examines expert projections that infectious diseases spread by insects could destabilize entire societies and affect worldwide populations for the next 20 years.

The sophisticated Inca civilization thrived for three centuries, had a powerful and dominate military and advanced architectural, mathematical, medical, and astronomical skills. How did Spain's Francisco Pizarro with 168 troops topple this empire in 1532?

The September 11, 2001 attacks impacted American society like no event since Pearl Harbor. This program examines the heroes who emerged amidst the horror of 9-11 and shows the selflessness of everyday men and women under the most adverse conditions.

Untouched for 3,300 years the opening of King Tutankhamen's tomb in 1922 created a worldwide interest in ancient Egypt that still exists. There is also, as this program explores the still unexplained deaths of many of the researchers who opened the tomb.

Spontaneous human combustion: Human bodies bursting into flame without any apparent heat source. Fire safety specialists, medical examiners, and forensics experts all agree: It takes massive amounts of heat to turn the human body to ash.