None that we are aware of, yet. However, the universe is enormously, incomprehensibly large, and it is - remotely! - possible that another planet very similar to Earth might exist elsewhere.
Possibly. The Universe contains everything that is physical and observable and exists in the set of dimensions that we're a part of. Anything outside of that is completely outside of our ability to...
Whether or not extraterrestrial life exists is of course open to speculation, for until we actually find it the answer has to be that we do not know, for not finding it does not preclude the...
noones quite sure yet about if there is life on other planets because there is just no scientific proof of that yet. It would take to long to trave to other planets outside of our solar system...
We have not yet found life on any other planet but discoveries on Mars suggests that may have been life there in the past. In fact, some scientists still hold hope that there may be life found there...