Alien (Featuring Will Smith) | Full Episode | One Strange Rock

Life on Earth starts as single-cell bacteria and stays like that for two billion years; then, a miraculous event transforms Earth into a complex interconnected web based on a competition for food. National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.

Courtesy of National Geographic on YouTube. Watch on YouTube ↗

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