After a mountain climber's severe injuries and near-death accident, he's told he'll never climb again. His recovery left him to confront the question: why, after coming so close to death, did he feel compelled to continue climbing?

Through an immersive combination of footage, photos and 3D CGI, this documentary reveals how different the Earth might be if the moon wasn't exactly where it is now. How does a rock orbiting a quarter of a million miles away from ...