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Questions and Answers
When did the earliest direct evidence of life on Earth appear?
When did the earliest direct evidence of life on Earth appear?
How old are the fossilized microorganisms found in hydrothermal vent precipitates believed to be?
How old are the fossilized microorganisms found in hydrothermal vent precipitates believed to be?
When did the origin of life on Earth possibly occur?
When did the origin of life on Earth possibly occur?
How far does the Earth's biosphere extend into the atmosphere?
How far does the Earth's biosphere extend into the atmosphere?
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Where is the earliest known life in the universe found?
Where is the earliest known life in the universe found?
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