| Tectonic-Scale Climate Change |
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| q | The faint young Sun |
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| paradox and its possible |
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| explanation. |
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| q | Why was Earth ice-free |
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| even at the poles 100 Myr |
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| ago (the Mesozoic Era)? |
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| q | What caused Earth’s |
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| climate to cool over the |
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| last 55 Myr (the Cenozoic |
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| Era)? |
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