After half a century traversing the world's oceans, Dr. Robert Ballard has figured out how to use remote technology to explore the bottom of the sea half a world away... and pick up lunch at his local deli all in the same afternoon. But now, dark forces are conspiring against ocean exploration. The world is running out of room. Earth's population has tripled in only 100 years. Livable land is almost maxed. Some say we can grow more food and find more room to live in outer space. Maybe even move to Mars. But is space really the answer? Bob Ballard thinks it's on our own planet, not in the next galaxy. So he travels the world to find out what the rest of us think. Should we be reaching up or should we be pushing down? Our very survival may rest in making the right choice.