Theoretically, aliens have a rather large chance of existence, whether their planetary conditions are equivalent to ours, or they have simply adapted to a different climate. (un)fortunately, they are at closest light years away. Without technology advanced enough to move us across space in a reasonable time frame, those aliens will have to go on without us for the time being. Assuming wormholes were an option, it could be done, but if wormholes do indeed exist, it is most likely at the center of a black hole, which screws time and space and is the size of a penny