Nova

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Unravel the greatest mystery in Arctic exploration: 160 years ago, the Franklin Expedition to chart the Northwest Passage vanished.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Murdered more than 5,000 years ago, Otzi the Iceman is Europe's oldest known natural mummy.

Murdered more than 5,000 years ago, Otzi the Iceman is Europe's oldest known natural mummy.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

The rocky planets - Mercury, Venus, Earth and Mars - were born of similar material around the same time, yet only one supports life.

Mars was once a blue water world studded with active volcanoes.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Murdered more than 5,000 years ago, Otzi the Iceman is Europe's oldest known natural mummy.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Murdered more than 5,000 years ago, Otzi the Iceman is Europe's oldest known natural mummy.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

The Forbidden City is the world's biggest and most extravagant palace complex ever built.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

The Forbidden City is the world's biggest and most extravagant palace complex ever built.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

Jupiter's massive gravitational force made it a wrecking ball when it barreled through the early solar system.

NASA's Cassini explores Saturn for 13 years, looping through its icy rings and flying by its moons.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

The Forbidden City is the world's biggest and most extravagant palace complex ever built.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

The Forbidden City is the world's biggest and most extravagant palace complex ever built.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with prehistoric populations numbering in the millions.

With exclusive access to groundbreaking new research, NOVA investigates the secrets of how and why the astonishing figures were made and the technology behind the still lethal and highly-advanced weapons carried by the clay warriors.

The ancient Maya built large complex cities with towering pyramids and temples that served as centers for a thriving civilization.

In the far reaches of the solar system, Uranus and Neptune dazzle with unexpected rings, supersonic winds and dozens of moons.

The ancient Maya built large complex cities with towering pyramids and temples that served as centers for a thriving civilization.

The ancient Maya built large complex cities with towering pyramids and temples that served as centers for a thriving civilization.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

Sir David Attenborough explores how a North Dakota fossil dig site could hold clues to what happened the day an asteroid struck Earth and wiped out the dinosaurs.

Sir David Attenborough explores fossils from a North Dakota site that could reveal what happened to the animals here the day an asteroid struck Earth and wiped out the dinosaurs.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

NOVA follows the epic operation to secure, raise and salvage the Costa Concordia cruise ship, which ran aground and tragically capsized off the coast of Italy on January 13th 2012, killing 32 passengers.

Follow the rebuilding of the 19th century Blenheim Covered Bridge.