Chemical Compunds for life

Life on earth begun so much early than it was expected because on it was on the right track in orbit of the earth and it had the right suitable conditons for complezies to evolve here In this world and the rapidly beyond, upon the development of life, aliens have played a significant role in the spread of Oxygen tank in the atmosphere of this planet and then so eventually they could jut specifically make this production so that once the microbes of humans become complex they would just breathe and learn more about the local area that they are from and then mainly.. use the area to learn specific tools to use and then build up all of that specific area of nothing, but later was prone to be so useful to expand themselves rapidly over there and then make sure that they creature the civilization

Now over the billions of years finally passedon, humanity have wandered once again In the great expansion and the vast distances of the universe upon where could alien life could be, so mathematically they have estimated that there could be about 50 billion civilizations, with all types of technological levels and also with scientific methods upon how much they generate energy and heat for their planet to sustain and get sunlight. from their star potentially.

So how much we would know that they would exist?

• Having an atmosphere whoch indicates that they have objects around their orbit, searching for cosmic different objects passing by and then if they have already seen it.