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Astrobiology
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Where, according to the current hypothesis, did life begin on Earth? Why is this hypothesis being challenged? What alternative is being proposed, as to where life began on Earth?
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Astrobiology
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Why do we breathe in oxygen and breathe out carbon dioxide? Explain your answer.
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Astrobiology
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What does the Mars rover do?
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Astrobiology
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The earliest forms of life on earth are found in rocks: a) 1 million years old. b) 4 million years old. c) 1 billion years old. d) 3.5 billion years old. e) 4.6 billion years old.
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Astrobiology
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What are biomolecules? Provide an example.
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