While testing Mars rover sensors in the Atacama desert, researchers inadvertently found a variety of unclassifiable microorganisms called “the dark biome”
at the Spanish Astrobiology Centre in Madrid and his colleagues took samples in a region of the desert called Red Stone, where the dust is red because it is full of hematite, the same mineral that gives Mars its rusty colour. “This is probably the most Mars-like place on Earth,” says Azua-Bustos. “Being there is almost like being on Mars, except for the colour of the sky.”
When they used state-of-the-art scientific instruments – the sort only available in laboratories on Earthto analyse the makeup of their samples, they found up to 1 microgram of DNA per gram of soil. This included DNA from 19 species of bacteria and two fungi.didn’t match anything in the genetic databases we have, leading the researchers to refer to those microbes as “the dark microbiome”.
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