Only a handful of science-fiction sequels have ever lived up to or surpassed the original. These five are the best of all ...

The space between galaxies is not empty. In a new map of the early universe, those “blank” stretches take on a faint, hydrogen-blue glow that had mostly escaped surveys until now. Astronomers working ...

While self-driving cabs aren't new, London's ancient road layout and busy streetscapes could pose special challenges for the ...