Science Channel HD

An exploration into whether breakthroughs such as high-energy lasers, antigravity technology and super-advanced aircraft are the result of human efforts alone or contact with UFOs.

Although alien abduction claims are often dismissed as hoaxes or delusions, there are landmark cases that scholars struggle to refute; Calvin Parker retells his harrowing experience of being abducted near the Pascagoula River in Mississippi.

UFO sightings have been caught on film across the United States, yet the government continues to deny the existence of extraterrestrials; recent news of the Pentagon's secret UFO program may reveal evidence of what the military has known for decades.

UFO experts investigate whether the value, reverence and desire for gold is the result of extraterrestrial landings in the ancient past.

A stone sphere, a hook and five fragments of wood are the only objects ever discovered inside the Great Pyramid of Giza; experts investigate if they can explain the mysteries behind the only surviving Wonder of the Ancient World.

In 1953, a team of archaeologists uncovers a bizarre, plastered human skull in the ancient city of Jericho; experts investigate the mysterious purpose and identity behind this 9,000-year-old clay-covered artifact.

Scientists wonder why Jupiter is hotter than it should be; the Curiosity Rover finds something strange on Mars; detectives turn to NASA for help with a murder cold case.

A mysterious object is orbiting Saturn, and it looks just like the Death Star; new evidence might shed new light on the mysterious death of Yuri Gagarin, the first man in space; when a cutting-edge satellite vanishes, fears of a space war escalate.

A photograph depicts two suns in the sky over Indonesia; ghostly white swirls on the moon's surface baffle NASA scientists; an astronaut disappears during his return to Earth.

Dark matter and dark energy are locked in an epic battle for control of the cosmos, and the winner will determine the fate of the universe; new discoveries might reveal which force will emerge victorious.

New discoveries have revealed thousands of exoplanets beyond the solar system, and some resemble earth enough that one could be a new home for humanity; with cutting-edge technology, finding the perfect one is the scientific challenge of the age.

Experts look at engineering blunders that have either caused catastrophes or are disasters waiting to happen; they use cutting-edge technology to examine what went wrong and to figure out if they can be fixed.

A deadly design flaw results in a horrifying rush hour bridge collapse that tragically leaves 13 dead in Minneapolis; using the latest science, experts investigate to reveal what went so catastrophically wrong on one of Minnesota's busiest crossings.

Tragedy strikes a bustling Canadian shopping mall when a parking garage suddenly collapses resulting in a fatal disaster; expert engineers use the latest technology to investigate and uncover a deadly design flaw that could have been prevented.

A series of violent explosions rips through a major Texas oil refinery, causing a fatal disaster and devastation on a terrifying scale; experts use the latest science to investigate and uncover what triggered a catastrophic malfunction.

A devastating rail disaster outside a small North Dakota town results in cargo erupting in massive explosions; experts use the latest science to investigate and uncover an engineering flaw poised for catastrophic failure.

Adam Savage teams up with TV personality Tory Belleci ("MythBusters") to stage the world's most epic food fight; using the latest science and technology, they build a rapid-fire weapon that turns hot dogs into projectiles.

Adam Savage teams up with Oscar-winning actor Gary Oldman to build one of Hollywood's deadliest weapons, the ZF1 Multi-Artillery Gun from "The Fifth Element," a weapon so lethal that it features both a rocket launcher and a flamethrower.

Adam Savage teams up with filmmaker Peter Jackson to restore a fleet of fighter planes; using cutting-edge technology, they stage a high-flying dogfight straight out of World War I.

Adam wants to build his own version of King Arthur's legendary sword: Excalibur; using the iron found in a meteorite, he attempts to make an indestructible weapon.

Richard Browning, the inventor and chief test pilot of the Gravity Jet Suit, which is powered by five 1,000-horsepower mini jet engines, helps get Adam's titanium Marvel Studios' Iron Man-inspired suit to fly.

Adam Savage and a NASA engineer team up to build a rocket-propelled experimental super-weapon that could have changed the course of World War II; using cutting-edge tech, they try to make this notorious engineering failure an explosive success.

Adam Savage and a demolition expert team up to test one of the most dangerous and explosive substances on the planet, and cutting-edge science and tech will reveal if nitroglycerine really deserves its notorious reputation.

Adam Savage and inventors build a deadly fleet of junkyard vehicles that look straight out of "Mad Max," and using scrapyard materials and wicked-smart engineering, they face off to see whose motorized monster packs the most vicious punch.

Adam Savage and a NASA engineer team up to build a rocket-propelled experimental super-weapon that could have changed the course of World War II; using cutting-edge tech, they try to make this notorious engineering failure an explosive success.