Venus was once Earth's twin before a runaway greenhouse effect

Venus: The Twin That Earth Could Have Become · 9:40 · Video: Great Documentaries · Watch at the source

In short: Discover how Venus transformed from a potentially habitable world with oceans into the hottest planet in our solar system. This documentary explores the catastrophic environmental shift that reshaped its surface.

The film examines Venus as a cautionary tale of planetary evolution. While it currently features a dense, toxic atmosphere and surface temperatures capable of melting lead, evidence suggests it may have once possessed continents and oceans similar to Earth's.

As the Sun grew brighter over time, Venus experienced a runaway greenhouse effect. This process fundamentally altered the planet, turning a potential cradle for life into a hellish environment defined by extreme heat and thick clouds.

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