Do you think that aliens exists?

The thing is with the history of human civilization and the amount of documentation we had even before phones and we still have no conrete existnse of aliens or god, so...I just think it they existed there'd be cold hard proof and communication already. But I do think it's possible for other forms of consciousness to exist on other levels though. The other thing is if the big bang is true which I believe it is...maybe other planets where beings can evolve to be human are on a similar timeline as ours as far as evolution goes. I mean we're all part of the same universe, which means the same age of the universe. So if there are other beings on other planets maybe they're also trying to figure out space travel, inter-dimensional stuff etc