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It is difficult to imagine life elsewhere. .. the sheer complexity of life in general and how it has evolved does my head in...just think of DNA and ask is it in effect a mere chemical that will given time turn out that way and therefore has the opportunity of being somewhat common in the Universe or do we have a special version or indeed the only version and other life uses a different mechanism...and mitacondria ..it seems very special and without it we would not be here nor any other animals or vegetation...is it a normal consequence of early life or is it special to us?
Would someone please answer those questions.
Alex
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