X” really does mark a spot in Sybille Canyon along Wyoming Highway 34, but it doesn’t mark the site of buried treasure. It’s ...

Sheer drama. That’s what the Great Sand Dunes are. Starkly beautiful desert dunes set against a backdrop of pretty, ...

New research suggests that Earth's first crust, formed over 4.5 billion years ago, already carried the chemical traits we ...

Beneath the crust of North America, scientists have found that the deep roots of the continent are slowly dripping away in ...

Fluorescent cave minerals are helping scientists explore how life could survive in harsh places like Europa. Far beneath ...

The reservoir itself is often called the “Clearest Lake in Kansas,” which might sound like faint praise to those unfamiliar ...

Modern continental rocks carry chemical signatures from the very start of our planet's history, challenging current theories about plate tectonics.

NPCA shares the latest archaeological discovery at Mammoth Cave National Park, which has a pretty fascinating human history, too.

The Perseverance rover has discovered an extraordinary rock on Mars, featuring a surprising structure that remains a mystery ...

Also: testing the efficacy of WWI “dazzle” camouflage; how the male blue-lined octopus survives deadly mating ritual.

Once again, Mars has presented us with an example of something it seems to have in abundance: extremely peculiar and baffling ...