Science HDTV (SCIHD)

American diplomats stationed in Cuba experience a bizarre mixture of noxious neurological symptoms and seem to be under a mysterious attack. Experts use cutting-edge forensic science to determine if a sinister, sonic weapon is at play. (Repeat).

New evidence might crack a cold case involving three inmates who are said to have escaped from Alcatraz prison. (Repeat).

The Scott Antarctic Expedition aspired to conquer the South Pole before anyone else, but this great endeavor of exploration never returned; now, newly uncovered evidence suggests this team may have succumbed to something more sinister than harsh elements. (Repeat).

Looking into the seismic activity of the one of the biggest active volcano in the world beneath Yellowstone National Park. (Repeat).

Brand-new evidence reveals the secrets of a Nazi program to build a nuclear bomb, and using cutting-edge science and tech, experts uncover classified files that reveal how closer Hitler came to this terrifying superweapon. (Repeat).

The wreckage of a missing nuclear submarine is mysteriously found on the ocean floor. The US Navy claims it was an accident, but declassified documents reveal startling new information that points to a Cold War coverup. (Repeat).

The Shroud of Turin is alleged to be Jesus Christ's real burial cloth, but it could be a hoax. Now, scientists use cutting-edge forensic analysis to determine the truth behind this astonishing holy relic. (Repeat).

A camera captures a person inexplicably bursting into flames. An ancient statue at a museum appears to come to life at night. An alien-like creature is filmed in the sewers. Eerie lights caught on camera may explain a mysterious death. (Repeat).

A man is twice hit by lightning; strange lights are spotted in the Norwegian sky; a bizarre glowing object is spotted at a museum, and some posit that it's an alien artifact. (Repeat).

Marine scientists discover a gruesome underwater death zone that seems to kill anything that dares to enter. When apocalyptic skies appear during a deadly earthquake in Ecuador, residents fear it's the end of days. (Repeat).

A high-speed chase ends when the fugitive makes an impossible getaway. A Louisiana swamp devours 100-foot trees, and experts worry a nearby town could be next. Three cars are filmed mysteriously levitating at a busy intersection. (Repeat).

An eerie creature is recorded stalking a Georgia forest, and some believe it's Bigfoot. Terrifying explosions rock the streets of Manhattan. Cameras record a mysterious object diving into a deadly volcano, leaving experts stumped. (Repeat).

A strange beast is spotted in a remote Brazilian town. A cataclysmic blast sparks fears of nuclear disaster. When a child displays superhuman powers, some fear it's the devil's work. (Repeat).

A high-speed chase ends when the fugitive makes an impossible getaway. A Louisiana swamp devours 100-foot trees, and experts worry a nearby town could be next. Three cars are filmed mysteriously levitating at a busy intersection. (Repeat).

An eerie creature is recorded stalking a Georgia forest, and some believe it's Bigfoot. Terrifying explosions rock the streets of Manhattan. Cameras record a mysterious object diving into a deadly volcano, leaving experts stumped. (Repeat).

A strange beast is spotted in a remote Brazilian town. A cataclysmic blast sparks fears of nuclear disaster. When a child displays superhuman powers, some fear it's the devil's work. (Repeat).

Marine scientists discover a gruesome underwater death zone that seems to kill anything that dares to enter. When apocalyptic skies appear during a deadly earthquake in Ecuador, residents fear it's the end of days. (Repeat).

The wreckage of a missing nuclear submarine is mysteriously found on the ocean floor. The US Navy claims it was an accident, but declassified documents reveal startling new information that points to a Cold War coverup. (Repeat).

The Shroud of Turin is alleged to be Jesus Christ's real burial cloth, but it could be a hoax. Now, scientists use cutting-edge forensic analysis to determine the truth behind this astonishing holy relic. (Repeat).

Something living is brought back from the moon; and an artificial object headed towards Earth. (Repeat).

Evidence of alien technology around a distant star; photos of Pluto show that something may be moving across its surface; and Apollo astronauts see something they can't explain while approaching the moon. (Repeat).

A mission to Mars captures an image of a structure; an eerie sighting on the dark side of the moon during the first Apollo mission; and a planet-eating star gives scientists a preview of Earth's demise. (Repeat).

Where did the Earth's oceans come from? For years, scientists suspected they came from molecules delivered to Earth from distant stars by asteroids, but an exciting new discovery suggests that its true origins are be more exotic than anyone imagined. (Repeat).

Scientists are using cutting-edge technology to stop an asteroid apocalypse, and for the first time, mankind is closer than ever to keeping Earth safe from these killer space rocks. (Repeat).

A record-breaking butt skipper; four motorcycles restrained by a woman; and a fast downhill bike ride. (Repeat).

A glass-breaking gorilla and a speed-racing sea lion face off against a snowman in the desert and an underwater wheelchair. (Repeat).

Snowboarding in the clouds; quad bike riding with a koala; and looping a car in a sphere. (Repeat).

Crazy critters and weird natural events are featured, including kangaroos in a bag, under ice swimming and subterranean hot-air ballooning. (Repeat).

A countdown of the top 20 crowd-pleasers: skilled souls who use their science to thrill. Included: close encounters in the wild; the world's fastest skateboarder; and a trapeze at 300 feet. (Repeat).

How to cook bread with a volcano, build underwater hotel rooms and go eyeball-to-eyeball with great whites. (Repeat).

An abandoned Vegas-style getaway with a deadly secret, a ghost town sinking into the earth, and a passenger train on a course for disaster are engineering catastrophes in need of repair, and experts use cutting-edge technology to reveal what went wrong. (Repeat).

Looking into what could have been done to avoid the destruction done by Hurricane Harvey. (Repeat).