"Any sufficiently advanced technology is indistinguishable from magic." - Arthur Clarke Having said that, While it may be possible that Aliens exist somewhere,

"Any sufficiently advanced technology is indistinguishable from magic." - Arthur Clarke Having said that, While it may be possible that Aliens exist somewhere, I don't believe that it's very likely at all that they can come here. Life in the Universe is isolated by long-distance, just like the divergent animals on desert islands in the vastness of the ocean.