Life in Evolving Universe

Lying in wait for us is the next question, how did it all start We have talked a little about the molecular picture of the evolution of life, in which less complex forms develop gradually into more complex ones. But where did the simplest forms of life spring from In the spirit of Darwinism, the answer is obvious they evolved, step by step, from the inanimate world. How did this happen There are no sm-viving witnesses — but there are scraps of evidence And, of course, we can turn to theory and experiments. So what do we know about evolution before life came on the scene  

Some scientists have suggested that hfe did not occur spontaneously on Earth, but was carried here from outer space. However, even if there were some firm evidence for this idea (which there probably isn t), it would not help. It just moves the goal posts. We would stiU have to answer the question of how life appeared out there. But since we have started talking about the cosmos, it is a good place to recall that the age of the Earth (4.5 10 years) is comparable to the age of the whole Universe (14 10 years). This is why it is natural to regard the appearance and evolution of life on the Earth in the context of the Universe s evolution. 

Some theorists argue that our Universe is just a part of the multiverse — one of a very large (or infinite) number of quite different universes. In any case, the conditions and physical laws in our part of our Universe are conducive for life evolution, because if it were not — we would not be here to discuss it. This is called anthropic principle, and we leave it for the reader to view it as either a deep philosophy or a truism. 

---