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This is a new low, even for life on Earth — geologists have found bacteria living 1.6 kilometers beneath the ocean floor, twice as deep as ever recorded before. The simple bugs (one cell pictured, at the end of the arrow) are related to the ones found at deep sea hydrothermal vents, but they represent a stunning new discovery in that they open up the possibility that as much as 2/3 of all the biomass on Earth could be buried beneath its surface. It also strengthens the possibility that life on other planets could be hiding out, just waiting to be found. More »
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