There’s something profoundly sad about the fact that the man who builds rockets to reach Mars can’t reach his own child on ...

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 ...

Before we get to Mars, we're going to have to practice. And develop radical leaps in technology, but also practice. A Mars mission will be utterly unlike anything attempted by humanity. We're talking ...

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 ...