Somehow, Hawking observes, "some of these atoms came to be arranged in the form of molecules of DNA. One possibility is that the formation of something like DNA, which could reproduce itself, is extremely unlikely.
Or it could be quite likely. There are theories that amino acids can form without life. Just get something resembling our planet's crust and they'll form and then they can form peptide chains and and so on. This means that any planet similar to earth could end up not just with carbon based life but with DNA based life.
Or it could be quite likely. There are theories that amino acids can form without life. Just get something resembling our planet's crust and they'll form and then they can form peptide chains and and so on. This means that any planet similar to earth could end up not just with carbon based life but with DNA based life.