Signature of Past Life on Mars?

Signature of Past Life on Mars

Home Plate opaline silica (left) occurs in nodular masses with digitate structures that resemble those at El Tatio (right). Credit: ASU/Ruff & Farmer

      During its wheeled treks on the Red Planet, NASA’s Spirit rover may have encountered a potential signature of past life on Mars, report scientists at Arizona State University (ASU).
Leonard David
Space.com
11-22-16

To help make their case, the researchers have contrasted Spirit’s study of “Home Plate” — a plateau of layered rocks that the robot explored during the early part of its third year on Mars — with features found within active hot spring/geyser discharge channels at a site in northern Chile called El Tatio.

The work has resulted in a provocative paper: “Silica deposits on Mars with features resembling hot spring biosignatures at El Tatio in Chile.” …

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