POPOCATÉPETL VOLCANO, Mexico — In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world's most active and whose eruption could affect millions ...
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Robot finds mud volcanoes beneath a lake’s surface
Hidden beneath the placid surface of a Siberian lake, a robot has mapped a landscape that looks more like an alien seabed than a freshwater basin. By tracing plumes of gas and reshaped sediments, ...
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