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Volcanic rock

Volcanic rock is an igneous rock of volcanic origin.

Note:   The above text is excerpted from the Wikipedia article "Volcanic rock", which has been released under the GNU Free Documentation License.
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November 28, 2023

In 1991, an experiment detected the highest-energy cosmic ray ever observed. Later dubbed the Oh-My-God particle, the cosmic ray’s energy shocked astrophysicists. Nothing in our galaxy had the power to produce it, and the particle had more energy ...
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New research combined both physiological and archaeological evidence to argue that not only did prehistoric women engage in the practice of hunting, but their female anatomy and biology would have made them intrinsically better suited for ...
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