Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

Earth’s magnetic field was rattled by a solar outburst that arrived with almost no warning, lighting up skies and briefly ...

The shortest day of the year is December 21. Not something to celebrate, you might think. Something to get through, like a ...

Our planet’s magnetosphere has seen dramatic shifts across its history—even total reversals—but this recent wrinkle doesn’t ...

Earth may not have to look quite so far for its moon because when our young planet was in a catastrophic collision with a ...

Learn how sulfur-based molecules essential to life may have formed before the first living systems appeared.

Located about 39 light-years from Earth, the TRAPPIST system resembles a miniature version of our solar system: The star, an ...

The idea that extreme climate change could one day cause a mass extinction and end the human dominance is not as farfetched ...

Scientists have detected tiny lightning bolts on Mars for the first time — they were found discharging around NASA's ...

The picture-perfect launch of twin Escapade orbiters bound for Mars presages a fantastical new age in exploring the planets, ...

Early this year, a surprise space rock made headlines around the globe when the International Asteroid Warning Network ...