NASA successfully crashed a spacecraft into an asteroid in a test of planetary defense. Now it will determine whether the mission was able to alter the asteroid's course.
Sci-fi authors like William Gibson foresaw what the Internet would bring. Inspired by their visions, NPR's Laura Sydell set out to see what artists and criminals think about and do with technology.
The titans of Silicon Valley have a grand vision of the future. But they have a tendency to miss the downside of their inventions — think cybercrime and online harassment.