Sir David Attenborough: A Billion Years of Earth's History Are Missing | Full Documentary

A billion years of Earth's history are missing from parts of the rock record. This Full Documentary investigates the Great Unconformity, the Grand Canyon's missing layers, and the extraordinary forces that may explain their disappearance.

Long before the dinosaurs, continents collided, mountains rose and vanished, and glaciers reached tropical latitudes. Could the extreme conditions of Snowball Earth explain this immense geological gap? And could the upheavals that reshaped our planet have helped prepare the oceans for complex animal life?

Follow the evidence from ancient canyon walls to microscopic clues preserved inside minerals. Explore the supercontinent Rodinia, the deep freezes of the Cryogenian, and the erosion capable of stripping vast amounts of rock from continental landscapes.

In this documentary, discover:

• What the Great Unconformity reveals about Earth's missing geological history.
• How scientists use rock dating and mineral cooling histories to investigate vanished landscapes.
• Why Snowball Earth became a major hypothesis for widespread erosion.
• How tectonics, volcanoes, weathering, and ancient oceans influenced a changing planet.
• The possible connections between environmental change, Ediacaran life, and the Cambrian Explosion.

The missing chapter varies from place to place, and its causes remain debated. Every surviving rock offers another clue to a world that existed hundreds of millions of years before humanity.

Which part of Earth's missing history surprised you most? Share your thoughts in the comments, and subscribe for more Earth history and science documentaries.

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