New Horizons, the fastest spacecraft humanity has ever launched has also traveled longer and farther than any other — more than nine years and three billion miles — beyond any space mission in history to reach its primary target. Today marks a historic milestone in the journey, as New Horizons flies by Pluto and its system of at least five known moons, sending back breakthrough reconnaissance. What new insights will that Pluto probe reveal to expand our understanding of other such planet-threatening comets? Dr. Michio Kaku offers us his perspective in a special op-ed article written by Dr. Kaku himself for the Wall Street Journal. READ NOW!