Sometimes the strangest things on Earth…are happening just below its surface. From tunnels carved by giant sloths to desperate attempts to stop the dead from rising again–these are the weird and wonderous tales of the sea beasts, hidden cities and impossible creatures that lurk beneath us.

Imagine free falling 30,000 feet without a parachute, or being buried alive and living to tell the tale. Or... what about getting trapped in a tiny room inside a sunken ship on the ocean floor...For three days? These are improbable yet true-life tales of surviving the most extraordinary conditions.

A blind man who uses bat-like powers of echolocation to navigate his surroundings? A samurai with reflexes faster than a speeding bullet? A man who’s immune to electrocution? These are the strange tales of humans with superhuman powers, including the man who’s a human lightening rod.

Picture this: a full-body gas mask for babies. How about Smell-o-Vision? Or a robot powered by eating slugs? These are all real inventions, and we’ve got them covered–including inflatable airplanes, hidden cameras in your contact lenses, and coffin security systems to protect you in the afterlife.

In Boston, a 25-foot tidal wave of…Molasses? A dancing plague that kills 100 people? A surgery with a 300% mortality rate? We search the globe for the strangest and most bizarre deaths on record. If the 1814 London Beer Flood doesn’t kill you, maybe a mysterious case of spontaneous human combustion will.

Did you ever wonder what it would be like to get attacked by a million bats with tiny bombs strapped to their chests? What about inflatable tanks, robot assassins, bazooka Vespas, war dolphins...The list of outrageous weapons goes on! These weapons, and others, pushed the boundaries of "possible" in the weirdest ways ever.

Shipwrecks, plane crashes, disappearances, and UFO sightings, oh my! This episode explores the Lake Michigan Triangle and many other wild and weird places, including a creepy doll-filled island with a dark past, deadly gas-filled explosive lakes, caves that harbor deadly viruses, and the most haunted place in the U.S.

From a headless chicken that lives over one year, to an out-of-this-world "celestial body" where it rains molten glass...We explore the most astonishing bodies through these truly unbelievable stories. Here are the true tales of not only the tallest human ever measured, but also the shortest person on record. What about the man who survived an iron bar through his head, or a Medusa-like body of water that turns its victims to stone? Brace yourself for the extraordinary.

Human bones as a "miracle cure" for gout; living mummies buried alive; a truly bizarre Victorian way to lose weight -- with tapeworms; from daily rites to once-in-a-lifetime rituals, the stranger side of human nature is revealed in these rituals.

Monkey glands for immortality, hypnotized assassins, and a brain-linked cyborg couple. We investigate some of the strangest experiments on record. From two-headed dogs and testicle transplants…These are the bizarre but real experiments that boggle the mind. Prepare to be astounded–and a little grossed out.