Science fiction films have shaped our collective imagination into believing that any planet harboring extra-terrestrial life would look like a lush green utopia, somewhat like Earth. But fresh research suggests that we should keep an eye on planets that look purple, instead of green, in our search for extra-terrestrial life.  ‘Purple bacteria can thrive under a wide range of conditions, making it one of the primary contenders for life that could dominate a variety of worlds,’ explains Lígia Fonseca
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