Guardian: An ancient ecosystem that has thrived in isolation for millions of years has been discovered in a pool of dark, salty water beneath half a kilometre of ice in Antarctica. Microorganisms in the pool evolved to live without light or oxygen after being covered by the Taylor glacier on the East Antarctic ice sheet up to two million years ago. Scientists estimate the pool’s temperature to be around -10C, but the water does not freeze because it contains so much salt – around four times as …