Now showing items 1-5 of 5

    • Emerging biogeochemical views of Earth's ancient microbial worlds 

      Lyons, Timothy W.; Fike, David A.; Zerkle, Aubrey Lea (2015-12-01) - Journal article
      Microbial processes dominate geochemical cycles at and near the Earth’s surface today. Their role was even greater in the past, with microbes being the dominant life form for the first 90% of Earth’s history. Most of their ...
    • Exoplanet biosignatures : a review of remotely detectable signs of life 

      Schwieterman, Edward W.; Kiang, Nancy Y.; Parenteau, Mary N.; Harman, Chester E.; DasSarma, Shiladitya; Fisher, Theresa M.; Arney, Giada N.; Hartnett, Hilairy E.; Reinhard, Christopher T.; Olson, Stephanie L.; Meadows, Victoria S.; Cockell, Charles S.; Walker, Sara I.; Grenfell, John Lee; Hegde, Siddharth; Rugheimer, Sarah; Hu, Renyu; Lyons, Timothy W. (2018-05-04) - Journal item
      In the coming years and decades, advanced space- and ground-based observatories will allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially habitable exoplanets for signatures of life. Life ...
    • Modeling pN2 through geological time : implications for planetary climates and atmospheric biosignatures 

      Stüeken, E. E.; Kipp, M. A.; Koehler, M. C.; Schwieterman, E. W.; Johnson, B.; Buick, R. (2016-12-01) - Journal article
      Nitrogen is a major nutrient for all life on Earth and could plausibly play a similar role in extraterrestrial biospheres. The major reservoir of nitrogen at Earth's surface is atmospheric N2, but recent studies have ...
    • The pale orange dot : the spectrum and habitability of hazy Archean Earth 

      Arney, Giada; Domagal-Goldman, Shawn D.; Meadows, Victoria S.; Wolf, Eric T.; Schwieterman, Edward; Charnay, Benjamin; Claire, Mark; Hébrard, Eric; Trainer, Melissa G. (2016-11-01) - Journal article
      Recognizing whether a planet can support life is a primary goal of future exoplanet spectral characterization missions, but past research on habitability assessment has largely ignored the vastly different conditions that ...
    • Using biogenic sulfur gases as remotely detectable biosignatures on anoxic planets 

      Domagal-Goldman, S.; Meadows, V. S.; Claire, M.W.; Kasting, J. F. (2011-06-27) - Journal article
      We used one-dimensional photochemical and radiative transfer models to study the potential of organic sulfur compounds (CS2, OCS, CH3SH, CH3SCH3, and CH3S2CH3) to act as remotely detectable biosignatures in anoxic exoplanetary ...