The race to Mars has quietly become the defining contest of twenty-first century spaceflight, pitting a state-backed Chinese ...

At an elevation of 1,532 feet, exceptional Cadillac Mountain is the tallest peak along the eastern seaboard of the United ...

Small lakes on ancient Mars may have remained liquid for decades, even with average air temperatures well below freezing.

All of which has yielded crisp views of many different Martian scenes, including the remnants of gaseous eruptions and impact ...

On a battered rock in an ancient Martian riverbed, a pattern of dark, rounded patches has jolted planetary science. These ...

Tiny bits of Earth’s atmosphere have been drifting to the moon for billions of years, guided by Earth’s magnetic field.