Add Yahoo as a preferred source to see more of our stories on Google. The winter solstice, famously the shortest day of the year, is nearly three weeks behind us. So why is the sun rising later than ...

Earth's rotation is randomly speeding up, and nobody is quite sure why. These speedups, which have occurred several times over the last few years, haven't had any effect on daily life, but they also ...

More objects are being launched into space than ever, and most are headed for low Earth orbit. This region of space has become increasingly crowded with launches from SpaceX and others that have ...