Beyond the Solar System

Mankind has always wanted to explore the unknown.  Today, we've explored the Earth's surface and probed the depths of its seas.  We've visited the moon and sent unmanned vehicles to the planets in our solar system.  However, the prospect of going much further seems daunting given the distances and timescales involved.  But new theoretical breakthroughs seem to justify some degree of hope for interstellar exploration.  What are these breakthroughs?  What are their implications?  What possibilities do they portend?  We'll give you .....