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Posts Tagged "biosignatures"

Life, Unbounded

Tricksy Mars may be Obscuring Signs of Organic Matter

The view from Curiosity (Credit: NASA/JPL-Caltech/MSSS)

[Correction: jarosite has indeed been detected on Mars, this post has been updated to reflect that fact.] Picture a hot volcanic spring. Mineral-laden acidic water flows through sulfur-rich rocks. A foul odor hangs in the air. For us it’s a nasty environment, best enjoyed through the lens of a tourist’s camera. But for tough thermophilic [...]

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Life, Unbounded

Plant Life Floods Earth’s Atmosphere


A new study estimates that 80 to 90 percent of the atmospheric water vapor originating from Earth’s continents comes from plant transpiration rather than simple physical evaporation. This process uses up almost half of the solar energy absorbed by our landmasses and represents a major piece of our terrestrial climate system. There may be implications [...]

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