Science Channel HD

Deep sea explorers discover an unknown monster thousands of feet beneath the ocean; killer fog threatens a town in the American Midwest; a truck spontaneously explodes on a busy freeway.

A strange creature similar to the Loch Ness Monster is spotted in the United States; experts analyze evidence of a giant scaly egg, and some wonder if it belongs to a dragon; birds are suddenly vaporized by an invisible death ray.

When a mysterious predator eats a shark, experts wonder if a prehistoric monster is to blame; a sinister sight is caught on tape near Russia's Area 51 and the evidence might point to a cover-up.

A giant creature in an armor of ice is spotted in the Alaskan wild, and some suspect it's a deadly mythical monster; a jet has a close encounter with an unknown object; evidence of a deadly lightning strike invites paranormal explanations.

In Montana, Clayton Phipps prepares to learn if his carnivore skeleton belongs to a tyrannosaurus rex or the controversial nanotyrannus; in Wyoming, Mike Harris and Aaron Bolan race against the impending winter digging at a promising new site.

A fire-breathing crater burns in the middle of a desert, and some believe it to be a gateway to hell; a deadly shark lurks in a golf course water hazard; a giant white blob threatens a town in California.

Neil Armstrong enters an unexplained spin; an Apollo 17 photo seems to show a US military outpost on the Moon; possible alien life swimming in the oceans of Jupiter's moons.

The discovery of geysers on a moon; NASA's mission to detect life; an object is spotted approaching an asteroid.

A distant planet shows an Earth-like atmosphere; a glowing light suggests an atmosphere on the Moon; why there are blueberries on Mars.

Exploring new discoveries that rewrite the history of the solar system, revealing a complex and violent story that begins with the birth of the sun from the debris of a massive galactic collision to its eventual fate as a lone zombie star.

Galaxies are locked in continual combat across the universe, and the Milky Way will face its biggest opponent ever, the Andromeda Galaxy, in a titanic and deadly struggle that could create a new and unrecognizable super galaxy.

Drill down on maintenance and safety lapses that derailed amusement park rides.

Bridge collapses have etched hard lessons into the history of engineering; Tacoma, Minneapolis, Genoa, symbols of innovation that have become stark reminders of what happens when flaws go unchecked.

Look back at the Tenerife, Kegworth, and Paris Concorde air disasters; investigate the design defects that made these aircraft vulnerable; look at the role air traffic miscommunications played; relive the terrible moments before disaster struck.

Pinpoint the mistakes that cause major structural failures; explore the preventable explosion inside London's Ronan Point; the code violations that collapsed Lalita Park; the short circuit that set off a deadly fire in Tehran's Plasco Building.

When dams break, devastation follows; Derna, Malpasset, Brumadinho, three disasters that turned engineering failures into mass tragedies.

Hunt for the root cause of atomic accidents; examine the Windscale fire, which led to safer reactor designs; learn why swift crisis management helped in the Three Mile Island incident; see why improper waste disposal fuelled the Kyshtym disaster.

The Genoa bridge collapse takes down a symbolic crossing and becomes one of Italy's deadliest engineering disasters; experts investigate and uncover years of slow deterioration to the structure's heavily corroded concrete encased cables.

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 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.

An unprecedented cycle of freezing and thawing causes dramatic destruction to a landmark bridge in Pennsylvania; experts investigate and reveal how a sudden surge of icy flood water buckled pier foundations weakened from years of erosion.

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.

Tragedy strikes a community when a condominium complex collapses in Miami, resulting in one of the deadliest engineering disasters in American history; experts investigate and reveal potential flaws in the structure's flat slab construction.

An unprecedented cycle of freezing and thawing causes dramatic destruction to a landmark bridge in Pennsylvania; experts investigate and reveal how a sudden surge of icy flood water buckled pier foundations weakened from years of erosion.