Mongabay: Living in isolation for millions of years, cut off from sunlight and oxygen, surviving by breathing iron beneath an Antarctic glacier–such are the conditions of newly-discovered microbes living under Taylor Glacier in Antarctica’s desert-waste, the McMurdo Dry Valleys. “Among the big questions here are ‘how does an ecosystem function below glaciers?’, ‘How are they able to persist below hundreds of meters of ice and live in permanently cold and dark conditions for extended periods of …