Featured category: Earth science

The mysterious origins of black diamonds, the natural nuclear reactor in Gabon, the singing sand dunes, and blood rain from intercontinental cloud algae.

Laurent ERRERA from L’Union, France [CC BY-SA 2.0], via Wikimedia Commons

Some crescent sand dunes sound like a sad tuba when you walk on them.


Black diamonds are only found in two places in the world, and we don’t know why.


In Gabon, scientists found evidence of a prehistoric naturally occurring nuclear reactor.


Blood rain
Unknown author / Public domain

Some blood rain comes from desert sands… but some blood rain comes from intercontinental cloud algae.

For more facts about the ground underneath us, the waters beside us, and the weather above us, begin here:

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