The chemical reaction that created life on Earth happened under highly specific conditions that are incredibly unlikely to have been replicated elsewhere, holds Alexandra Ossola of Futurism. Simply put, it is pretty much impossible that lifeforms similar to us live on other planets. If at all, some scientists theorize that there may be a chance of microscopic lifeforms existing in the universe. But they would be so different from us that detecting them would be incredibly hard. Earth’s setting enabled the combination of proteins that created the ancestors of all lifeforms, from humans to plants. Nowhere else in the known universe could this have happened.
While ultimately unproven, the existence of aliens is worth considering, given the huge amounts of unexplained incidents and UFO sightings, particularly those reported by the military, suggest Cooper, Blumenthal and Kean in The New York Times. The US ran a program, between 2007 and 2012, which investigated alien life. It documented the sightings over several aircraft, which flew in unnatural ways that couldn’t be explained with known technology. Video evidence of unidentified flying objects, taken by US jets, has been released. Even foreign materials and metals have been gathered and examined. Still, much of this information remains classified.