For decades, Europa has been the optimistic counterpoint to a lonely solar system, a small icy world that seemed to tick ...

Scientists refine the timeline of sponge origins, showing soft-bodied ancestors likely evolved later than some chemical ...

Crystals hidden in Australia’s oldest rocks have revealed new clues about how Earth and the Moon formed. The study suggests ...

Mars has an active, electrically charged surface where dust storms and spinning dust devils regularly move and reshape the ...

Pandora, the latest in a long portfolio of University of Arizona's space science missions, has cleared its last major ...

"We're not saying, and we can't say, that there's no life in Europa. What we're saying is that it's a harder proposition, ...

Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...

Life on Earth began in a world of volcanic eruptions, violent storms, and a toxic atmosphere. Yet somehow, from this chaos, ...

Mars, often depicted as a barren red planet, is far from lifeless. With its thin atmosphere and dusty surface, it is an ...

Scientists say Earth’s magnetic field may have funneled atmospheric particles to the moon for billions of years. Lunar soil could preserve a record of Earth’s past while providing resources for future ...

Rare earth elements are an easy-to-find, hard-to-refine resource critical for everything from magnets and electronics to ...

A new analysis of stress, tides and interior forces suggests Jupiter’s icy moon Europa lacks the active seafloor faulting ...