National Geographic HD

Coastal erosion exposes skeletal remains; researchers discover a special type of spider; new evidence leads archaeologists to unravel the unsolved mystery of the lost Roanoke settlers; thousands of dead seals confound a wildlife enigma.

A headless skeleton is discovered on Australia's Beacon Island; near the Marshall Islands, a huge undersea crater is discovered; in Mexico, an island full of dolls reveals a grim history; animal bones are found on an island in the English Channel.

Archaeologists explore hidden tombs and find spectacular mummies.

A look at the migration patterns of millions of animals on this planet that have been passed down for generations.

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Peat diggers find a head near Silkeborg, Denmark and authorities investigate whether it is related to the missing boy; the police discover that the body is much older than the missing person and call the museum to investigate.

The human remains of a woman are found near Vejle, Denmark; an archaeologist begins to tell a story about who she was and why she was murdered, connecting her to ancient fairy tales and even King Harald Bluetooth.

Two bodies are discovered near the town of Weerdinger, Netherlands; locals jump to conclusions that the two bodies belong to a man and woman united in life and death.

Human remains are discovered near Croghan Hill, Ireland, a significant place for ancient kings; the investigation takes a turn when authorities realize the body is not a current missing person or murder victim.

In the mountains of Northern Italy, a discovery is made by a couple of mountaineers; in a nearly unreachable part of the world, human remains are found sticking out from a glacier; these turn out to be those of the oldest mummified human ever found.

Archaeologists find traces of a sea-battle that transformed Ancient Rome; archaeologists investigate how Rome rose to dominate the ancient world.

An exploration of Herculaneum, the twin to Pompeii that also got buried during a deadly volcanic eruption; the discovery of an intact skeleton, the first excavated in 25 years, helps investigators piece together the final hours of Herculaneum.

Archaeologists investigate the fate of Nero and his buried Golden Palace.

An exploration of Hadrian's Wall, the largest structure built by the Romans; experts examine the Wall, its forts, gatehouses, and garrison town to see how civilization and culture grew.

Archaeologists reveal how the Colosseum came to symbolize the might of Rome.

Archaeologists unearth a sacrificial skull, investigate a mummy, and crawl through underground tunnels as they embark on new digs in Pompeii.

Rediscovering the true legacies of queens Cleopatra, Nefertiti and Hatshepsut.

Investigating whether Cleopatra died by cobra or political murder.

Probe into the death of a living god with clues from tablets and forensics.

Archaeologist Pepi Papakosta is on a mission to find Alexander the Great's lost tomb; excavating in the center of Alexandria, Egypt, she discovers a rare statue of Alexander and secret tunnels.

Investigating whether Cleopatra died by cobra or political murder.