"26 years ago: A girl in South Dakota falls through the earth, then wakes up dozens of feet below ground on the palm of what seems to be a giant metal hand. 9 years ago: She is a top-level physicist leading a team of people to understand exactly what that hand is, where it came from, and what it portends for humanity. Today: with the remainder of the giant robot found and assembled, every question answered about the mysterious contraption raises two...