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All life on Earth can be traced back to a Last Universal Common Ancestor, or LUCA—and it likely lived on Earth only 400 million years after its formation.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Heres what youll learn when you read this story: All life on Earth can be traced back to a Las…

What we know

  • Source: Popular Mechanics
  • Byline: Darren Orf
  • Published: 03 May 2026 13:11

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