If you consider the fact that a human being is made up of carbon, helium, oxygen, nitrogen, and hydrogen, and a star is made up of those very same elements, life in this vast universe has to be abundant, and not just on this one miniscule, rudimentary, planet called Earth. Carbon is a naturally abundant nonmetallic element which forms the basis of most living organisms. It is the fourth most abundant element in the universe, and plays a crucial role in the health and stability of this planet, and billions of others, through the carbon cycle. Not only do we exist in this universe, the universe itself exist in us.
The carbon cycle centers around the fact that the same carbon atoms in your body today have been used in countless other molecules since time began. The carbon cycle is similar to the cycles of water. The same water you shower with has been around for thousands of years.
There are an estimated 70 sextillion stars in the observable universe (which is only the 4% of the universe that we have been able to study via the Hubble Telescope, and other powerful telescopes, Hubble is stationed about 350 miles above the surface of the Earth). 70 sextillion is 70 million million million. Most of the stars, like our Sun, have planets revolving around them. To think that we are the only intelligent life in the universe would be absurd. Not only are we not alone, but we're more than likely not anywhere close to being the most intelligent. We are a lesser evolved species because we kill one another, we manipulate one another for selfish purposes, we go to war over purposes of greed, and we base our moral codes (which are not followed by the way) on archaic, medieval holy books. This is clearly not an indication of a highly evolved being. We're probably not even in the top 1000.
