Views of a Martian lake bed (left) compared to Earth features that were formed by microbial mats (right). The Martian sandstone, about 3.7 billion years old, appears to have layers of stacked microbial mats, pockets eroded into those layers, and places where sections of mat rolled up or cracked after drying out. Nora Noffke, who mustered the evidence, says: This hypothesis is testable and warrants further scrutiny in current and near-term missions to Mars.
Posted on: Mon, 29 Dec 2014 15:32:19 +0000
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