Life on other planets. Does it exist? This has been debated in philosophical and scientific circles since human beings first exhibited rational/philosophical thought.Regardless of where you stand on the issue, it is mind-boggling to think about the immensity of the universe. Do you ever look up at the sky at night, observing the millions and billions and trillions of stars, and just think about the immensity of it all?I truly wonder if our brains are even able to grasp the concept of just how large and vast the universe is.Here are some statistics I found when perusing NASA's website:There are at least 100 billion (with a b) galaxies in the observable universe, of which ours, the Milky Way, is only oneOur sun is just one of over 100 billion stars in the Milky Way aloneIt is estimated that there are 2 to 3 trillion (with a t) planets in the universeMost interestingly, it is estimated that there are 8.8 billion Earth-sized, habitable planets in the Milky Way aloneWhen you really think about these findings, is it logical to think that not one of those 2 to 3 trillion planets have life? Is it logical to think that our planet is the only one in existence in which life exists?Since many of these planets are so many light-years away that human beings would never be able to travel to them (unless we develop the ability to travel at the speed of light), we may never know the answer to this question. But it is so fascinating to ponder, discuss, and debate.What are your thoughts? Do you believe life on other planets exists?