Was there ever life on another planet? Could there be life on another planet again? What makes the Earth support life? This article investigates these questions in depth.

Concepts

astrobiology

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Additional Tags

life on earth, pbs, nova, ability to support life, existence of life, planets ability to support life

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Classroom Considerations

• Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)