The Great Permian Extinction
More than 250 million years ago, when the current continents formed a single land mass, known as the Pangea and there was one super-ocean called Panthalassa, something extraordinary happened. Nearly all life on Earth was wiped out. Over 90% of all marine…
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Geology
Devils Postpile National Monument
Established in 1911 by presidential proclamation, Devils Postpile National Monument protects and preserves the…
Geology
Glaciers: Rivers of Ice
Glaciers are massive sheets of ice that occur on every continent of the world except Australia. These giant…
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Sex and the Sea Slug
The sea slug, Aplysia. Now there's an expert on sex. Equipped with both male and female sex organs, this…
Engineering
Red Dot Replacing Cross Hairs
A bullet fired from a gun becomes subject to the pull of gravity and begins to fall the instant it leaves the…