#PPOD: As carbon dioxide frost sublimates with the warming Martian spring, a pattern emerges of dark brown sand dunes interspersed with the remaining bright frost. Image taken by the HiRISE camera onboard NASA's Mars Reconnaissance Orbiter. Credit: NASA / JPL-Caltech / University of Arizona

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#PPOD: NASA's Voyager 1 probe launched in 1977 and is now the most distant human-made object from Earth, traveling through interstellar space. Recently, NASA engineers had to figure out why the probe was suddenly sending unreadable data. After nearly six months of analysis and re-programming, they got Voyager correctly transmitting again. Truly a feat of human ingenuity. Credit: Dave Granlund

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The permafrost is thawing, a process that will warm the planet in a positive feedback cycle that will produce methane and carbon dioxide, two gases observed in the atmosphere of Mars. Could microbes be involved? It’s “De-Permafrosting” on Big Picture Science.

Listen here: https://bigpicturescience.org/episodes/de-permafrosting

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