I believe we (humans) are the Aliens of tomorrow.

Meaning, so many people are looking for intelligent life beyond our solar system, when it is obvious (biblically and naturally) that we will be the aliens others are looking for in the future. 

We assume something greater than us is around, but we are the crown of creation. If the Lord tarries, we will colonize other planets, and if post-mils are correct (which I strongly doubt) and we are here for another 100k years, we will be the extraterrestrials of tomorrow.

Our timeline, given the universe has only been around for about 6,000 years, is short and it really points to us being the ones that spread across the cosmos first, not another civilization. We are made in God's image, with great intelligence, we may populate the far reaches of our galaxy and beyond. Besides, we keep trying to do just that even now, with the deployment of more satellites and probes to distant places in deep space. I would not be surprised if we found life on another planet, because we put it there.

Food for thought: https://science.slashdot.org/story/22/02/26/0614216/are-we-prepared-for-contamination-between-worlds

Soli Deo gloria