Quote:
Originally Posted by Glenzig
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Sometime in the first billion years, life appeared on the earth’s surface. Slowly, the fossil record indicates, living organisms climbed the ladder from simple to more advanced forms. ◾Robert Jastrow, Red Giants and White Dwarfs, 1979, p. 97.
◾The critical first billion years, during which life began, are blank pages in the earth’s history. ◾Robert Jastrow, Red Giants and White Dwarfs, 1979, p. 97. Letting the Fossil Record Speak, Life—How Did It Get Here? By Evolution or by Creation?
Seems very contradictory.
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Robert is proposing a hypothesis based on observation of the fossil record. It is a guess but one built from massive amounts of circumstantial evidence.
"Slowly, the fossil record indicates, living organisms climbed the ladder from simple to more advanced forms."
Which would infer the further you traveled back in time the simpler life would be. How long would it take for life to go from strands of replicating proteins to cells by his guess would take a few billions years. We already know for a fact that the first cells appeared around 3.5 billion years ago. So proto cells would have to form much earlier.
We dont have really any fossil remains from 4billion years ago so it remains a hypothesis.