Originally posted by sonhouse
The link says they believe "they have solved the mystery of how it was possible for life to begin on Earth" but then explains how the chemical building blocks formed known to be essential for modern
life, which is not necessarily
those that would be essential for the every first
life to form and use. What is the justification for the assumption that the two must necessarily
be one and the same thing? Why can't the very first life credibly used different chemical building blocks and only later evolved to use and depend on the chemical building blocks of modern life? I personally see no reason.
For example, the very first life might not have used either RNA nor DNA but rather just used a RNA-like substance but made of different chemical building blocks from modern RNA. I see no special reason to exclude the possibility.