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Home Q & A Board Science-Related Homework Help Physics Astronomy
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adreamer adreamer
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7 years ago
Evidence from the analysis of zircon crystals suggests that the Earth
A) may have been habitable immediately after its formation
B) could only have been habitable after significant amounts of oxygen had built up in its atmosphere
C) could only have been habitable after the end of the Hadean Eon 500 million years ago
D) may have been habitable in as little as 100 million years after its formation
Textbook 
Life in the Universe

Life in the Universe


Edition: 4th
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DonskoyDonskoy
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7 years ago
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adreamer Author
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6 years ago
Awesome Slight Smile
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