This artist’s impression shows multiple small devices soaring on sunlight at the edges of Earth’s atmosphere. Scientists have devised tiny featherweight disks that could float on sunlight in Earth’s ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But mitigating this is its far greater distance, plus the fact that Earth appears much ...

Mars is known for its barren desert landscape and dry climate. But two recent studies go beneath the surface: They explore the interior of the red planet using seismic data from NASA's InSight mission ...