Hi shadow71
Do you consider the video and the article by Szostak & Ricardo "Life on Earth" in Scientific America Sept. 2009: A theory? A hypothesis? Speculation? Wishful thinking? |
I would say that it is a scientific hypothesis for one way life may have begun on earth. There are others.
We don't have any direct evidence for how life began 3.5 billion years ago on earth, so we may never know: the oldest fossil bearing rocks already show simple life forms existing, so we don't know when it really began or what came before, except that it occurred some time after the formation of the earth (unless it came from space), some 4.55 billion years ago. That doesn't give us much to work with.
http://www.fossilmuseum.net/Tree_of_Life/Stromatolites.htm
quote:
Stromatolites are not only Earth's oldest of fossils, but are intriguing in that they are our singular visual portal (except for phylogenetic determination of conserved nucleic acid sequences and some subtle molecular fossils) into deep time on earth, the emergence of life, and the evolving of the beautiful forms of life of modern time. A small piece of stromatolites encodes biological activity perhaps spanning thousands of years.
I would say that it is a scientific theory for how life can begin from chemicals and natural reactions.
The difference is that theory is supported by experimentation and the evaluation of the evidence from this and similar studies: it has been tested, while the actual origin of life is not.
The development of the theory for how life can begin is an integral part to the formation of the hypothesis for how life did begin, as it provides the evidentiary basis to make the hypothesis.
Enjoy.
we are limited in our ability to understand
by our ability to understand
Rebel American Zen Deist
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