Late in the story of Mars, long after its lakes and rivers had faded, something quiet still moved beneath its dusty surface.

From towering mountains to vibrant coral reefs, our planet is adorned with breathtaking wonders sculpted by the forces of nature over millions of years. These natural marvels are proof of Earth’s ...

PACIFIC CITY, Ore. — Scott Burns, professor emeritus in geology at Portland State University, thought he had seen it all — until he saw a couple of photos of an extremely rare sand formation on the ...