The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars

@article{Mahaffy2015TheIO,
  title={The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars},
  author={P. Mahaffy and C. Webster and J. Stern and A. Brunner and S. Atreya and P. Conrad and S. Domagal-Goldman and J. Eigenbrode and G. Flesch and L. Christensen and H. Franz and C. Freissinet and D. Glavin and J. Grotzinger and J. Jones and L. Leshin and C. Malespin and A. McAdam and D. Ming and R. Navarro-Gonz{\'a}lez and P. Niles and T. Owen and A. Pavlov and A. Steele and M. Trainer and K. Williford and J. Wray},
  journal={Science},
  year={2015},
  volume={347},
  pages={412 - 414}
}
Of water and methane on Mars The Curiosity rover has been collecting data for the past 2 years, since its delivery to Mars (see the Perspective by Zahnle). Many studies now suggest that many millions of years ago, Mars was warmer and wetter than it is today. But those conditions required an atmosphere that seems to have vanished. Using the Curiosity rover, Mahaffy et al. measured the ratio of deuterium to hydrogen in clays that were formed 3.0 to 3.7 billion years ago. Hydrogen escapes more… Expand
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