Science Channel HD

When a river of blood washes through a city's streets, some witnesses believe it's a warning of doomsday; a strange, perfect circle emerges in the clouds about California, with some experts speculating that it's evidence of alien activity.

A ghostly figure is caught on tape stalking people in Japan, providing evidence for the truth of a local legend; a mysterious flame appears in the Norwegian wilderness with the fury of the Viking god, Thor.

An explorer searching for treasure at a Mayan sacrificial site is attacked by a mysterious underwater fog; thousands of fish spontaneously jump to their deaths; something alien appears over the skies of Los Angeles.

A minuscule metal sphere containing two microscopic holes could be the smallest murder weapon in history; experts explore how this tiny object is linked to one of the most bizarre true crime cases of the 20th century.

Investigating whether a gold death mask is the face of a king who fought in the Trojan Wars; three ancient chalk carvings could be the secret to constructing Stonehenge; how a printing plate from the UK Treasury ended up in an Austrian lake.

Glimpsing into the internet's most chaotic crevices; monster trucks on two wheels; tile smashing robots; massive slime bubbles.

Counting down the top internet legends; these are the smartest and bravest people using science to take their skills to the next level; learning how to pull a wheelie in a boat, take inline skates off road and shoot an arrow around a corner.

More than 100 million pieces of small space debris are floating around the Earth; a collision between two of these objects in low Earth orbit could be catastrophic.

Neutrinos are the most mysterious particles in the universe, and they power some of the most explosive events in the cosmos; new discoveries reveal how these ghosts pass through objects undetected and why they could be the reason humans exist.

The hidden kingdom of microscopic alien organisms shapes the universe as much as galaxies, stars, and planets; new discoveries reveal how bacteria, viruses and other micro-organisms built life on Earth and influence humanity's future in the cosmos.

When sea levels rise, storm surge barriers work overtime to fight floods; it takes a team of experts to maintain these engineering marvels to prevent catastrophe and keep millions of people safe.

A dedicated crew of mariners race time as they dredge North America's busiest shipping canal to allow safe passage for huge oil tankers; specialists repair years of corrosion and damage to get a massive ferry operating safely.

Technicians battle staggering heights and fierce winds to upgrade a communications tower that keeps millions connected; special access to this dangerous job site reveals what it takes to get the job done.

Maintenance crews at a remote airstrip are exposed to the elements as they keep water-bombing aircraft flying to battle forest fires; mechanics race against the clock to get transport helicopters to safely shuttle oil rig workers.

Working thousands of feet above the California desert, engineers and crews perform perilous high-wire acts to keep a hi-tech tramway system operating safely for the hundreds of daily tourists it transports.

When the world's oldest roller coaster breaks at the worst possible moment, skilled engineers and technicians race against the clock to investigate what went wrong and how to fix it before it's opened to the public.

A determined team of expert technicians battle nature's destructive forces to keep one of the world's longest road bridges open in deadly conditions.

A vital Mississippi River interstate crossing is discovered to be in danger of imminent collapse in Memphis; experts use the latest science to investigate and uncover severely compromised load-bearing tension members with a life-threatening weakness.

Catastrophe strikes Miami, Fla., as a 13-story condominium tower collapses with deadly debris; experts use the latest science to investigate and uncover an uncontrolled method of demolition that led to catastrophic failure.

A devastating earthquake wreaks havoc on an iconic San Francisco bridge and leaves drivers fearing for their lives; experts use the latest science to investigate and uncover a weakened expansion joint caused by catastrophic shockwaves.

The construction of a new parking garage at a luxury waterside condo turns disastrous as it collapses in Jacksonville, Fla.; experts use the latest tech to investigate and uncover critical design flaws and unsupported lower levels.

A deadly explosion strikes a major crude oil port creating an inferno of epic proportions in Corpus Christi, Texas; experts use the latest science to investigate and uncover a failed dredging operation that ruptured a propane pipeline.

New York residents get a rude awakening when a disastrous crane collapse causes chaos on the downtown streets of Manhattan; experts use the latest tech to investigate and reveal how a slight increase in wind conditions created major catastrophe.

The construction of a new parking garage at a luxury waterside condo turns disastrous as it collapses in Jacksonville, Fla.; experts use the latest tech to investigate and uncover critical design flaws and unsupported lower levels.