Doubting Too writes:
Question:
1. If Darwin can conjecture that the tribolite descended from one-precambrian ancestor, and if there is found today a living tribolite almost exactly the same as in the fossil--can I speculate that Darwin took us for a ride?
You do realise that for something to evolve from a parent specie does not require the extinction of the parent specie, don't you?
Imagine if you had a parent specie X and this specie was separated by some geological change (such as a land mass being separated by water). We can call these X and X1.
Then a population pressure is placed upon X1 (but not X).
X1 will evolve to adapt to the new population pressure (X will not).
Role the clock on and X1 (who evoled form X) are happily living life to the full.
X is still around.
Makes sense?