Bill Nye "the Science Guy" believes that aliens are out there somewhere, even though no one is really sure where they will be found. With so many undiscovered galaxies in space, it seems only logical that some form of alien life exists, even if we haven't found one another yet.
"It's gotta exist outside the solar system," Nye recently said while speaking with HuffPost Live. "I mean there's 200 billion stars in this galaxy alone. Then you start talking about the hundreds of billions of galaxies. Hundreds of billions of galaxies, which in turn have hundreds of billions of stars, which in turn have tens of hundreds of billions - trillions - of planets. Come on!"
When it comes to the Earth's solar system, Mars and Jupiter's moon of Europa seem like the most likely places to search for alien life. Last year, NASA scientist Kevin Hand said humans would find some form of alien life within the next 20 years, while Nye said that could take up to 30 years.