Welcome to brain Stuff production of I Heart Radio. Hey brain Stuff, Lauren Bugle Bomb here with a classic episode for you today. Traditionally, it's been thought that liquid water was necessary to sustain life as we know it, but some research has indicated that that might not be the case. I'll let former Lauren explain, Hey their brain Stuff Lauren Vogel bond here. Life's resilience keeps astounding us. Unimaginable as it may seem, there's a thriving population of microorganisms in
the cold, dry, nutrient poor soils of Antarctica. A study may have just revealed the secret to their survival, and that revelation could transform our quest to find life on other planets. Antarctica is a continent which famously goes dark for months on end during the winter season, a period in which it sees no sunlight. This presents a big challenge to organisms who need to photosynthesize, that is, convert
solar light into food. Intense dryness is another hurdle. Certain parts of the continent received no precipitation whatsoever, and even though Antarctica is covered in ice, drinkable water is scarce. And then we have the issue of carbon all known life is based on this element, and yet very little of it can be found in Antarctic dirt. But life uh finds a way. For years now, biologists have known about the existence of diverse bacteria communities in Antarctica's soils.
How could anything survive under such extreme conditions. To gain some insight, a team of Australian and New Zealander scientists took a hard look at micro filled dirt samples from two ice free sites in eastern Antarctica. Both areas are deserts where no plants can grow. The McMurdo Dry Valleys region has even been compared to the surface of Mars. The place has received no rainfall in almost two million years, its humidity levels are staggeringly low, and ice, snow, and
liquid water are all practically non existent there. On December six, the team published their findings in the journal Nature. They reported seeing DNA traces from twenty three microbial organism inside those soil samples. By reconstructing the microbes genomes, the scientists learned that many of these life forms had genes that made them exceptionally good at processing carbon, monoxide and hydrogen.
The researchers theorized that the organisms are able to meet their energy requirements by pulling both of these gases, along with carbon dioxide, straight out of the atmosphere. In other words, because of Antarctica's shortage of sunlight and suitable water, as well as nutrient poor soil, these microbes could be surviving off of air alone. Should this be true, planets and moons that were once written off as completely uninhabitable might be able to sustain life after all. Maybe alien organisms
don't need drinking water or abundant sunlight on their home worlds. Instead, it could be that the only thing they require is the right combination of atmospheric gases. But the study scientists say more research is needed to see if this phenomenon exists in other parts of the world as well as outside of it. Today's episode but written by Mark Fancini and produced by Tristan McNeil and Tyler Clang. For more on this and lots of other expectation breaking topics, visit
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