The blue marble we call Earth remains in large part a mystery to the 8 billion people who live on it. How did Earth come to exist, and what are the secrets of its survival? How long will humans be able to call it "home"?

For centuries, we've been fascinated by our nearest planetary neighbor, Venus, and its shimmering appearance in our night sky. But this glowing yellow orb that's about the same size as our world is covered in massive volcanoes, poisonous clouds of acid rain, and a surface temperature hot enough to melt lead. Is Venus our evil twin--or a warning about what Earth will become in the future?

From massive asteroids and deadly bursts of radiation to microscopic alien viruses, each one of these cosmic dangers may end human civilization as we know it. Can we prepare for the inevitable calamity that may be coming our way? Or are we doomed to oblivion?

We humans want to boldly go into uncharted territories to make new discoveries. As the next era of space exploration begins, what will we find when we reach other planets? What dangers will we face when we try to conquer these new frontiers?

Earth’s moon is only one of hundreds in the solar system–each of them a mysterious and often bizarre world. Could alien moons offer a key to exploring outer space and perhaps even finding a new home for humanity?

Humanity has worshipped the Sun since the beginning of time, and yet even with our modern technology, we still know so little about it. Could unlocking the mysteries of the Sun be the difference between life and death for human civilization?