Everyone has a different opinion about Aliens. Do they exist? Are they really there? Well, a chief NASA scientist, and most of the organization, certainly think so.  "I think we're going to have strong indications of life beyond Earth within a decade, and I think we're going to have definitive evidence within 20 to 30 years," says NASA chief scientist Ellen Stofan. This is quite the exciting time in the science world.

The Hubble Space Telescope has lead to many discoveries and many scientists have found evidence of water on many celestial bodies, including the a dwarf planet called Ceres, and Jupiter's moon, Europa. Water is key to life, and if the living conditions are reasonable, there is certainly a chance.

"We are not talking about little green men,” Stofan admits, “We are talking about little microbes." Though some may think that this is boring, and microbes don’t count as aliens, the NASA scientists believe this is a remarkable discovery. John Grunsfeld, a former astronaut, thinks that this is a very exciting moment in time.

Think what you will, but space scientists, NASA researchers, and generally curious people alike are very excited. If extraterrestrials do exist, it will only be a matter of time until we find them.