We would not find any human species outside our solar system, unless the same environment like earth exists.

Human-like species will not exist elsewhere in the universe, unless they live exactly in an earth-like environment.

In Nature, the purpose of life is to achieve a goal. In human terms, it is called happiness.

Recognize that the very molecules that make up your body, the atoms that construct the molecules, are traceable to the crucibles that were once the centers of high mass stars that exploded their chemically rich guts into the galaxy, enriching pristine gas clouds with the chemistry of life. So that we are all connected to each other biologically, to the earth chemically and to the rest of the universe atomically. That’s kinda cool! That makes me smile and I actually feel quite large at the end of that. It’s not that we are better than the universe, we are part of the universe. We are in the universe and the universe is in us.

And when you look at the sky you know you are looking at stars which are hundreds and thousands of light-years away from you. And some of the stars don’t even exist anymore because their light has taken so long to get to us that they are already dead, or they have exploded and collapsed into red dwarfs. And that makes you seem very small, and if you have difficult things in you life it is nice to think that they are what is called negligible, which means they are so small you don’t have to take them into account when you are calculating something.

Dawkins’s advice shows that he didn’t understand probability. . . . Dawkins said that a creature the lives millions of years would have a different feeling for the meaning of the chance of an event than we have. If the alien lives a hundred million years, he could have played very many hands of bridge Then, Dawkins said, it would not be unusual for him to see a ‘perfect’ bridge hand where each player was dealt thirteen cards of the same suit. ‘They will expect to be dealt a perfect bridge hand from time to time, and will scarcely trouble to write home about it when it happens.’
He’s wrong. One can easily calculate the chance of Dawkins’s alien experiencing a perfect bridge hand at least once in his lifetime. The shance of getting such a hand in one deal is 4.47 x [10 to the minus 28th power]. If the alien plays 100 bridge hands every day of his life for 100 million years, he would play about 3.65 x [10 to the 12th power] hands. The chance of his seeing a perfect hand at least once in his life is then 1.63 x [10 to the minus 15th power], or about one chance in a quadrillion. That’s less than Dawkins’’ chance of coming to New York for two weeks and winning the lottery twice in a row. Would he bother to write home about it?