Here are 20 true and false questions to test your knowledge of volcanoes. 1. Volcanoes are openings in the Earth’s crust that ...
Morning Overview on MSN
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 ...
Learn more about volcanic activity on Mars and how it may have once provided vital elements to the atmosphere.
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