Stargazers who turn their eyes skyward — and use a little bit of imagination — will have a chance to spot a rare “smiley face” in space later this month.

Perseverance just stumbled upon one of Mars’ weirdest rocks yet—a formation covered in dark, spherical shapes with mysterious ...

The planet's once-strong magnetic field appears to have been limited to its southern hemisphere, the apparent result of a fully liquid inner core that differs from that of Earth ...