Explorers use a sacred ancient Mayan temple code to search for an occult underworld engineered in Mexico; investigators in Britain discover the secret technology behind a life-size statue of Jesus Christ that came to life.
The mummified crocodiles of Kom Ombo; using an X-ray on an ancient mummy; China's terra-cotta army; scientists solve a year-old murder using 15th-century forensics; virtual-reality techniques afford investigation of crucifixion.
A team of divers builds and tests a deep-sea diving suit; a time-traveling ghost ship; 16th-century war fleet.
Building a replica of a 2000-year-old jet engine; a weapon that can shoot around corners; a gun that is made from fruit; beating the ancient world's land-speed record.
Martial artists wield six-foot-long steel swords in India; camels as weapons of war; armor made from paper were designed to stop arrows; 2000-year-old unmanned weapon.
Ancient Roman navy SEAL technique of capturing enemy ships from underwater; Roman war dog units; the Mastiff; the samurai sword; the Horro is designed to protect cavalryman from arrow fire.
Ski commandos battle through storms and snow drifts; a tiny army in the Egyptian desert defeats a major invasion force; the Bayeux tapestry; the Naftun.
A secret manual explains how the Vietnamese defeated the United States in the 20th century and the Mongols 700 years earlier; King Mithridates; the invention of booby-traps and letter bombs; Spartacus revolts against the Roman Empire.
Leeches, an ancient medical cure; taking a reading from a torpedo fish in Spain; Incan trepanning; Roman battlefield surgery; using snake venom as medicine; England's Prince Henry V undergoes brain surgery to extract an arrow.
Ancient secret agents; fire beacons, horses and pigeons are used to transmit messages over thousands of miles; ancient spies use invisible ink made from human sperm and write messages inside raw eggs; Japanese ninjas use explosives.
Investigating history's most impregnable fortresses; the castle that helped create Great Britain; Cappadocia's invisible underground defensive systems; Mayan killer bee castle defenses; the Roman siege of Alesia in Gaul.
Ancient prototypes of the modern gun; an ancient manuscript has a recipe for tracer fire; mega-mortar; the bizarre "wind of the cannonball" phenomenon.
Early methods of airborne attack; medieval kite bomb; bouncing bombs terrorize shipping in Turkey in 1453; Chinese commanders use whistling arrows to direct battles; Chinese rockets; the earliest known successful parachute.
Investigating Bible stories to find if they have basis in scientific fact; determining Goliath's size and considering the technology of the sling David used to fell him; Tower of Babel; levitating a replica of the Ark of the Covenant.
The amazing successes and stunning failures of ancient military engineers influence today's weapons and tactics; an ancient Greek weapon is still used on aircraft carriers; rapid-firing Chinese catapult; Hannibal crosses the Alps.
Unique technologies of ancient miners, including a Roman hydraulic system, sappers who could undermine castle walls and the 1689 origination of gunpowder mining in England.
Revealing the terrifying truth behind torture; ancient inventors go to great lengths to develop precision devices to exact pain; the rack; burning at the stake; Vlad the Impaler.
Asian battle elephants and Europe's medieval knights in armor demonstrate people in the past understood the modern tank's principles combining protection, speed and firepower; ancient antitank weapon.
Citizens of ancient Tyre use fire ships against Alexander the Great's besieging fleet; Roman Emperor Nero builds a death yacht to kill his own mother; a 15th-century weapon designed to pierce enemy hulls; ancient paddle-wheel boat.
Comparison test between a shotgun and a staff, the oldest known weapon; the deadly Chinese "ermei" underwater attack weapon; examining whether Chi warriors can really kill a man with a single touch; ancient Chinese crossbows.
New discoveries unveil the ancient blueprint for modern life in the metropolis of New York.
China's master shipbuilders create some of the most powerful warships and greatest fleets of the ancient world.
Many of today's lethal military weapons owe their origins to inventors of the ancient world who created siege machines, land mines, flamethrowers and more.
Modern forensic techniques help firearms experts reveal the accuracy, power and range of ancient bullets, rockets and bombs.
Experts investigate antiquity's legendary naval inventions, including high-explosive grenades, covert underwater attack equipment and biological warfare.
Cutting-edge technology reveals exciting archaeological discoveries at the bottom of the ocean.
Mesopotamian engineer Al-Jazari invents many devices.
The robotic inventions found in the mythical texts and how they compare with machines known in the ancient world.
Chinese technology such as cosmic machines, hydraulic hammers, water-controlled clocks and mass production plants powered by water.
Exploring how modern military innovations stem from ancient Chinese inventions like gunpowder and automated crossbows.
The weapons and wars of ancient Egypt.
A discovery spotlights two limestone coffins that date back 3000 years.
Ships from the ancient world and the societies that created them.
The mix of religion and science.
The team tries to figure out how successfully ancient peoples traveled overland.
Analyzing a site in Turkey, believed to be the location of Troy, through modern technology, archeology and engineering.
Greek genius Archimedes used reflected sunlight to set fire to Roman warships besieging Syracuse in 214 B.C..
Warfare was a way of life in the ancient world. From an early version of napalm to the most sophisticated siege machine in history, the conflicts were just as lethal as today.
The Nemi ships, the titans of Rome's naval engineering, were raised from the deep by Mussolini but then destroyed by a retreating German army.
Heron of Alexandria was considered the most brilliant inventor in the ancient world, developing automatic doors and coin-operated machines.
Galen, a Roman doctor who treated gladiators, performed brain surgery 2,000 years ago; examining the sophistication of ancient Roman medicine.
About 1900, sponge divers find the Antikythera mechanism on a shipwreck deep in the Aegean Sea, and archaeologists date the analog computer to 87 B.C.