>
> I doubt fish would be universal.... They're hardly universal here...!
> Even if life began in the same way, in the sea and all, think of the many
> directions it might have gone.... If you look back at the cretaceous
> extinction (about 250 MYA, the largest extinction known)
Don't you mean the Permian? The cretaceous extinction was 65 MYA ago.
You'll see there
> are many, many now extinct branches of life. Its perfectly feasible that
> any of these may have evolved to take over the seas, rather than the ones
> that eventually gave rise to chordates and fish. That's assuming that
> life started in the same way, or didn't diverge from the same path far
> earlier.
>
> JW.
Moon
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