Jovaro,we know the Bible is true. This is a knowledge and it is truth. Our beliefs revolve around this, but our knowledge of God and His Word is not simply belief. It is a truth we know and live with day to day as much as we live with gravity, sunlight, and air.
There is an indication in the Bible that there is no other intelligent physical life in the universe. As a Christian, then, I would not be bothered at all by single-celled life forms found other places. I would, however, be extremely suprised by intelligent life any other place.
The fact that the earth is showing up to be unique in as much of the universe as we know is therefore also no surprise to me -- or to other Christians.
You are welcome to imagine what you like. But the data support the Bible.