Science Channel HD A helicopter made for extreme environments aids US Army rescue efforts in some of the most harsh conditions; a trio of small but capable tugboats moves cargo vessels through the busiest port of Alaska. 2026-06-10 The Yeti is a custom-made snow-eater that keeps a critical Alaskan airport open for business; experts reveal how cutting-edge engineering and the latest technology keep this machine running in the toughest conditions. 2026-06-10 When melting ice threatens to flood a town, a 22-ton amphibious mega machine battles the elements to save the day; in the Arctic, the Canadian Air Force relies on a massive transport aircraft to deliver supplies and personnel to far-off places. 2026-06-10 A deadly tragedy on a freeway in Oklahoma sends one of the state's busiest bridges collapsing into the Arkansas River below; expert engineers investigate how a tugboat striking a reinforced concrete pier could cause such a catastrophic disaster. 2026-06-10 Catastrophe strikes as one of America's most vital freeway intersections erupts in flames and completely collapses in San Francisco; experts use the latest science to investigate how an overturned tanker truck spawned a devastating inferno. 2026-06-10 Construction turns catastrophic in New Orleans when the side of a hotel complex collapses on a busy street below; expert engineers investigate to uncover the reason behind this sudden and fatal disaster. 2026-06-11 Atlanta's Mercedes-Benz Stadium, the world's most advanced stadium, features the most complex retractable roof ever built; the team races to finish the $1.6 billion arena for the NFL season. 2026-06-11 A shipping catastrophe occurs when a massive container vessel runs aground and completely blocks one of the most vital trade routes on the planet; experts investigate and uncover critical wind conditions and potential navigational errors. 2026-06-11 A vital hillside highway in Pennsylvania is destroyed in just minutes after a catastrophic landslide rocks a community; engineers investigate and uncover undetected geological issues with an increased and unstable traffic load. 2026-06-11 Atlanta's Mercedes-Benz Stadium, the world's most advanced stadium, features the most complex retractable roof ever built; the team races to finish the $1.6 billion arena for the NFL season. 2026-06-11 A shipping catastrophe occurs when a massive container vessel runs aground and completely blocks one of the most vital trade routes on the planet; experts investigate and uncover critical wind conditions and potential navigational errors. 2026-06-11 A vital hillside highway in Pennsylvania is destroyed in just minutes after a catastrophic landslide rocks a community; engineers investigate and uncover undetected geological issues with an increased and unstable traffic load. 2026-06-11 Construction turns catastrophic in New Orleans when the side of a hotel complex collapses on a busy street below; expert engineers investigate to uncover the reason behind this sudden and fatal disaster. 2026-06-11 The Yeti is a custom-made snow-eater that keeps a critical Alaskan airport open for business; experts reveal how cutting-edge engineering and the latest technology keep this machine running in the toughest conditions. 2026-06-11 When melting ice threatens to flood a town, a 22-ton amphibious mega machine battles the elements to save the day; in the Arctic, the Canadian Air Force relies on a massive transport aircraft to deliver supplies and personnel to far-off places. 2026-06-11 Assembling the internet's most valuable players, the heroes who use science to win the day; the world's longest manual riding a skateboard; people pulling cars with their teeth; a person skiing behind a super car. 2026-06-11 Lost tapes show that Apollo astronauts heard unexplained transmissions on the far side of the moon; an amateur astronomer finds an odd disturbance in Martian atmosphere; an unidentified object in Earth orbit starts stalking Russian spacecraft. 2026-06-11 A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago; experts investigate if an extraterrestrial Armageddon transformed an Earth-like world into a wasteland. 2026-06-11 Earth's history is marked by one cosmic disaster after another, forging the path of human evolution; now, experts explore how the Earth has teetered on the verge of destruction. 2026-06-11 As the two Voyager spacecraft reach interstellar space, experts explore their astonishing discoveries and how their extended operation has transformed into the ultimate mission. 2026-06-11 Lost for centuries, scholars believe the Ark of the Covenant never left Jerusalem and remains buried beneath this ancient city; now, a pioneering team of archaeologists is on a quest to unearth the most famous and treasured artifact in human history. 2026-06-11 Ancient documents and legends suggest that the Ark of the Covenant may have been stolen by Roman legions and hidden in Rome; a team of archaeologists explores mystery cults and ancient catacombs to uncover the truth behind this treasured artifact. 2026-06-11 Ancient scriptures describe the Ark of the Covenant as possessing an almighty force with the capacity to kill; now, an expert team of archaeologists traces the ark's destructive path in a quest to discover the truth behind its mythical power. 2026-06-11 According to biblical scripture, the prophet Jeremiah hides the Ark of the Covenant at a remote location for safekeeping; a team of archaeologists investigates sacred sites and ancient tombs to retrace the possible journey of this lost artifact. 2026-06-11 The holy order of the Knights Templar are believed to have located and seized the Ark of the Covenant centuries ago; now, expert historians follow the trail of this elusive order to uncover the truth behind this sacred relic's mysterious journey. 2026-06-11 Some allege that the Ark of the Covenant was stolen by King Solomon's son and taken to Ethiopia thousands of years ago; now, archaeologists investigate new, mysterious leads to uncover the secrets behind this lost relic's elusive journey. 2026-06-11 A war-torn Italian ghost town immortalized by a legendary Hollywood director blurs the lines between fiction and reality; experts investigate and uncover a forgotten landscape of ruins captured in a WWII documentary. 2026-06-11 An old compound in Texas bears the scars of a violent revolution; a secret facility outside Berlin is used by a dictator to escape justice; the estate of an aristocrat becomes a stronghold for the IRA. 2026-06-11 An elaborate stadium in Lithuania hosts an unlikely Cold War matchup; an industrial relic in England gets caught in a heated labor dispute; a gothic-style tower in Memphis attracts rock and roll royalty. 2026-06-11 Palatial ruins in Philadelphia symbolize an industrial golden age; a remote outpost in France is thrust to the front lines of World War II; a palazzo right off the Italian coast becomes a prison for mob bosses. 2026-06-12