Are we alone in the universe? It's one of the most intriguing questions in science, because there are only two possibilities, Yes or No, and either is equally exciting and terrifying.
The bounds of our astronomical knowledge have expanded exponentially in the past 100 years; our observable universe is suddenly bigger than we can comprehend. With trillions of galaxies and quadrillions of stars, it seems impossible that we'd be the only living things within this vast universe, and the only way to know for sure is for us to look.
The easiest place for us to really investigate firsthand the possibility of alien life, is in our very own cosmic backyard, the solar system. Our solar system is home to some pretty remarkable places, many with the potential for life as we know it.
