Finch beaks are an example of micro-evolution. What’s the takeaway from that? That every organism evolved from the same ancestor? LOL.
Micro-macro, who knows?
It's certainly extremely doubtful that the Erf is <8000 years old.
The Restaurant at the end of the Universe may explain it...
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I would argue that it’s not even micro-evolution. It’s a variation in species. A finch is a finch is a finch.