Although the range of Stephen Hawking's cosmological investigations is almost boundless, he's long been drawn to a handful of really big ideas that are also powerful engines of curiosity and imagination across the world. Professor Hawking continues his quest to make his science accessible to all and never more than right here with the "three big things" -- Leaving Earth, Aliens and Time Travel. These three visionary ideas are both the themes of his new show Into the Universe with Stephen Hawking and powerful concepts that might ultimately play a defining role in humanity's future. (Source: The Discovery Channel)