Deep water currents moved oil-consuming bacteria around; Droughts threatened the Khmer Empire in the 15th Century; Scientists present largest map of dark matter; Phobos-Grunt will fall down to earth Show more
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Deep water currents moved oil-consuming bacteria around; Droughts threatened the Khmer Empire in the 15th Century; Scientists present largest map of dark matter; Phobos-Grunt will fall down to earth Show more