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. Get More National Geographic: About National Geographic: National Geographic is the world's premium...

47 min - Space & the Universe - National Geographic

More: Searching for Aliens documentaries

Read Deeper: Searching for Aliens

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Watch Next

• What Happens If We’re Contacted By Aliens? (51 min, Spark)
• Is There A Simple Solution To The Fermi Paradox? (21 min, PBS Space Time)
• There Are Thousands of Alien Empires in The Milky Way (14 min, Kurzgesagt)
• Why Aliens Might Already Be On Their Way To Us (11 min, Kurzgesagt)
• Are There Lost Alien Civilizations in Our Past? (10 min, Kurzgesagt)
• Why We Should NOT Look For Aliens - The Dark Forest (11 min, Kurzgesagt)
• What Do Alien Civilizations Look Like? The Kardashev Scale (12 min, Kurzgesagt)
• We’ve Been Searching for Aliens the Wrong Way. That’s All About To Change. . . (21 min, PBS Space Time)