"Origination of life occuring more than once" - that's a very interesting idea worth to be tested. Where can I read more about it?,(reply>), @Mountain Fisher So what? Flip coin 2^100 times and you'll get 100 heads in a row. It just means that we can be alone in the observable universe. <br>And your "The simplest protein is made from 100 homo chiral amino acids" has absolutely no evidence. No one knows complexity of the simplest self-replicating system.,(reply>), How are you going to test the origination of life? It happened here 3.5 billion years ago, a cyanobacteria that started photosynthesis and began our oxygen cycle and for all we know because it is so complicated it was created. We cannot create artificial photosynthesis let alone a self-replicating life form.<br><br>Carrying on experiments that create carbon compounds is not creating life it is chemistry. The racemic amino acids  made in the Miller-Urey experiment in the early 50s isn't creating left handed chiral amino acids. The simplest protein is made from 100 homo chiral amino acids. So you have to get heads 100 times in a row.