The adventurous journey of Spaceship Earth
During its worst climatic episodes, about 2300 million years ago and about 700 million years ago, the Earth was in deep freeze. Even tropical coastlines would have looked like this scene from Antarctica today, to judge from evidence of stones dropped by icebergs near the equator. The explanation is...
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| Format: | Book Part |
| Language: | English |
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Technical University of Denmark
2009
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| Online Access: | https://orbit.dtu.dk/en/publications/5385f6f5-6172-468e-be5c-7c8ac78a1d96 https://backend.orbit.dtu.dk/ws/files/8054856/Engineering_challenges_2009.pdf |
| Summary: | During its worst climatic episodes, about 2300 million years ago and about 700 million years ago, the Earth was in deep freeze. Even tropical coastlines would have looked like this scene from Antarctica today, to judge from evidence of stones dropped by icebergs near the equator. The explanation is that our planet suff ered from the eff ects of close encounters between other galaxies and the Milky Way, which provoked enhanced star formation rates and intense cosmic radiation. |
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