Fantastic answers to universal questions

A long time ago, in a galaxy far, far away, someone had the idea that science would be at its most interesting when it was being subverted. Just as science itself was developing, storytellers began expanding the worlds of physics, biology, chemistry and engineering. They came up with a universe full of lightsabers, spaceships and robots, steeped in a heady brew of technobabble and draped on a background of journeys to exotic worlds. But science fiction is more than just pulp fiction; at its core is the desire to understand humanity's place in the universe. We asked leading scientists from around the world what science fiction meant to them: how they related to it and what influence it had on them.