The existence of our solar system's innermost planet has been common knowledge since ancient times, but that doesn't actually mean we've always know much about it. Mercury's proximity to the Sun has allowed it to jealously guard its secrets, and so this NASA video offers an unprecedentedly detailed view of the…

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As the only metal that is liquid at room temperature, mercury is freaky even under normal conditions. But check out what happens to a blob of the stuff when it's exposed to a different audio frequencies.

Almost fifty years after his death, Frank R. Paul remains one of the biggest names in science fiction art and pulp magazine illustration. These visions of life on moons and planets throughout our solar system (recently posted to reddit with no attribution to Paul, his work, or his impact) provide us with another…

It was found last year in Morocco, but scientists now say this strange, green rock likely originated on our solar system's innermost planet.

Tiny Mercury, the innermost planet of the solar system, may look to the human eye like Earth's moon. But appearances can be deceiving.

Has Curiosity detected organics on Mars? Not yet, said NASA in a press conference held earlier today. But last week, the Agency presented some of the most compelling evidence to date that Sun-scorched Mercury not only hosts impressive quantities of water ice, but organic (i.e. carbon-containing) molecules. But why is…

Clusters of craters can resemble all kinds of everyday objects. On the surface of giant asteroid Vesta, for example, three craters positioned in a line give rise to a terrestrial formation commonly known as "Snowman". In the photo featured up top, three craters in "superposition" bear a striking resemblance to one…

This image may look like a splatter of abstract digital artwork, but it's actually a map of the far side of the moon. A far cry from the monochromatic topical maps that we're used to seeing, these colorful maps instead document the surface reflectivity of geologic features throughout our solar system.

Until NASA's spacecraft MESSENGER took up orbit around Mercury last year, the surface of the solar system's innermost planet was a great mystery. Now we've gotten a good look — and we have no idea what we're looking at.