TV Guide Science Wednesday

UFO researchers investigate what really happened during some of the most incredible and sometimes life-threatening encounters between law enforcement and UFOs.

New evidence suggests that the holiest religious sites in the world have been deemed sacred because of contact with interstellar travelers in the distant past.

Investigators reveal the secret connection to the UFO phenomenon and several U.S. Presidents, including FDR, Truman, Eisenhower and the Kennedy assassination.

New evidence and modern-day sightings of UFOs have experts thinking that Native American myths and legends of Star People may have existed on Earth.

In a normally quiet English suburb, cameras capture shocking footage of a woman mysteriously disappearing from her bed next to her sleeping husband.

When footage surfaces of a man under attack from an alleged alien, investigators use the latest technology to look for the truth.

Experts discuss a mysterious expedition that Neil Armstrong led into the Amazon to find a legendary library that holds all knowledge of an ancient civilization.

A strange discovery by NASA's Mars Curiosity rover suggests the "Red Planet" was home to an alien nuclear war 300 million years ago.

When NASA discovers something strange on Saturn's biggest moon, experts investigate if it could be caused by aliens feeding on the world's electric atmosphere.

Experts explore the two Voyager spacecraft's discoveries and how their extended operation into interstellar space has transformed into the ultimate mission.

Saturn has more than 80 moons with underground oceans and magnetic fields and experts explore how these satellites could rewrite the rules of the Solar System.

Robots roam the Martian surface on a mission to uncover its secrets; Perseverance joins this dedicated group of machines to uncover life on the Red Planet.

An unbelievable barge can carry a train along Alaska's high seas; a fish factory on a remote island produces more than three million pounds of seafood a day.

Alaskan engineers construct a dam large enough to power an entire town; a view is given from the world's largest helicopters; a boat lift pulls a 400-ton ship.

Alaska's Coast Guard battles treacherous waters to maintain three stories-tall buoys; machinery combusts 800 feet below Alaska's surface.

An airport in Alaska is made of only water and ice; well-built vehicles are made to endure the arctic to travel across the tundra; missiles in hiding.

A sturdy ship is constructed to weather tsunami-sized waves and travels dissimilar to any other in North America; machines fight a flood in the Arctic Circle.

A machine with 588 sharp teeth known as the Yeti helps service the coldest airport in America; tugboats plow through ice chunks in a hectic Alaskan port.

Experts use the latest science to investigate and uncover an inadequate structural design a weakness in critical supporting columns in a New Zealand building.

Experts use the latest science to investigate and uncover an outdated, wooden storage facility heavily stocked with volatile, explosive chemicals.

A crane collapse leaves seven dead on a holiday weekend in Manhattan; an investigation reveals how a shortcut was taken while raising the crane.

Residents along the Pacific Coast Highway are cut off from the world after a storm causes a bridge to buckle; experts reveal it was vulnerable to erosion.

Experts use the latest technology to investigate and reveal bridge scouring with unsupported concrete columns exposed for failure in Huron, Calif.

In Puerto Rico, an iconic observatory nestled into a giant crater must close after cables holding up a critical platform come crashing down.

Residents along the Pacific Coast Highway are cut off from the world after a storm causes a bridge to buckle; experts reveal it was vulnerable to erosion.

Experts use the latest technology to investigate and reveal bridge scouring with unsupported concrete columns exposed for failure in Huron, Calif.

In Puerto Rico, an iconic observatory nestled into a giant crater must close after cables holding up a critical platform come crashing down.

A crane collapse leaves seven dead on a holiday weekend in Manhattan; an investigation reveals how a shortcut was taken while raising the crane.

A sturdy ship is constructed to weather tsunami-sized waves and travels dissimilar to any other in North America; machines fight a flood in the Arctic Circle.

A machine with 588 sharp teeth known as the Yeti helps service the coldest airport in America; tugboats plow through ice chunks in a hectic Alaskan port.