A. Steele

Questioning the evidence for Earth's oldest fossils

Martin D. Brasier, Owen R. Green, A. P. Jephcoat et al. · Nature · 2002 · 945 citations

Earth Science, Engineering, Biochronology +2

Comet 81P/Wild 2 Under a Microscope

D. E. Brownlee, P. Tsou, J. Aléon et al. · Science · 2006 · 917 citations · Full text

Cosmic Abundance, Solar System Origin, Engineering +10

A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars

J. P. Grotzinger, D. Y. Sumner, Linda C. Kah et al. · Science · 2013 · 876 citations

Organic Geochemistry, Biogeochemistry, Curiosity Rover +10

Mars’ Surface Radiation Environment Measured with the Mars Science Laboratory’s Curiosity Rover

Donald M. Hassler, C. Zeitlin, R. F. Wimmer‐Schweingruber et al. · Science · 2013 · 649 citations · Full text

Organics Captured from Comet 81P/Wild 2 by the Stardust Spacecraft

Scott A. Sandford, J. Aléon, C. M. O'd. Alexander et al. · Science · 2006 · 576 citations

Organic Geochemistry, Environmental Chemistry, Biosignature +11