And it is precisely because we do not know which makes life so awesome. The quest for knowledge continues.
I for one am very pumped to find out what Science discovers in the rest of my lifetime.
I was very excited to learn about the discovery last year of a planet similar to Earth (Kepler-186f).
It is also very wonderful that we know what we do know. And that time and time again, Science has proven religion to be false.
At one time Religion claimed that the Earth was flat, that it does not move and is the centre of the universe, that the heavens are static/unchangeable, that the Earth is only 6,000 years old, that if you are afflicted in some way (say with leprosy or epilepsy or some other issue) that you are an abomination - you are evil or in disfavour with God or that demons possess you or you are in league with Lucifer.
The hunger for and pursuit of knowledge has been the one thing that has lifted us out of the tyranny of those who believe mythology is truth.
I would suggest that you begin to regularly check in with the Scientific community.