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Planetary science

Being there

The protoplanets that collided to make the Earth may themselves have had atmospheres and oceans. Venus has vastly more argon and neon than Earth: fossil evidence, perhaps, of protoplanetary atmospheres?

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  1. Genda, H. & Abe, Y. Nature 433, 842–844 (2005).

    Article  ADS  CAS  Google Scholar 

  2. Lissauer, J. J. Annu. Rev. Astron. Astrophys. 31, 129–174 (1993).

    Article  ADS  CAS  Google Scholar 

  3. Chen, G. Q. & Ahrens, T. J. Phys. Earth Planet. Int. 100, 21–26 (1997).

    Article  ADS  Google Scholar 

  4. Genda, H. & Abe, Y. Icarus 164, 149–162 (2003).

    Article  ADS  Google Scholar 

  5. Agnor, C. & Asphaug, E. Astrophys. J. Lett. 613, 157–160 (2004).

    Article  ADS  Google Scholar 

  6. Morbidelli, A. et al. Meteorit. Planet. Sci. 35, 1309–1320 (2000).

    Article  ADS  CAS  Google Scholar 

  7. Nakajima, S., Hayashi, Y. & Abe, Y. J. Atmos. Sci. 49, 2256–2266 (1969).

    Article  ADS  Google Scholar 

  8. Pepin, R. O. Icarus 92, 2–79 (1991).

    Article  ADS  CAS  Google Scholar 

  9. Zahnle, K. J., Kasting, J. F. & Pollack J. B. Icarus 84, 502–527 (1990).

    Article  ADS  CAS  Google Scholar 

  10. Owen, T. et al. Nature 402, 269–270 (1999).

    Article  ADS  CAS  Google Scholar 

  11. Wetherill, G. Icarus 46, 70–80 (1981).

    Article  ADS  CAS  Google Scholar 

  12. Sasaki, S. Icarus 91, 29–38 (1991).

    Article  ADS  Google Scholar 

  13. Ballentine, C., Marty, B., Lollar, B. S. & Cassidy, M. Nature 433, 33–38 (2005).

    Article  ADS  CAS  Google Scholar 

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Zahnle, K. Being there. Nature 433, 814–815 (2005).

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