Thanks! I legit never thought about it that way having spent all my time in the bit less wrong camp till now.

Reminds me of the "nature always evolves into crabs" or some such meme where there's a few examples of convergent evolution of the general crab form.

Oh yeah there's an entire article on it ofc https://en.m.wikipedia.org/wiki/Carcinisation

say that to Pando's face not online see what happens

Made me wonder: how likely would it be that a modern ginkgo could not reproduce with an ancient one?

"Living fossils", still reproducing and subject to evolution, but it's interesting that they still look like the fossils we find of them.

I don't know how many are actually afflicted with the misunderstanding that these living fossils are individually as old as the fossils we find of their ancestors, but I think "they basically haven't changed" and "even through the pressures of evolution which they are definitely not exempt from, they have retained most of their features because they still work" are close enough for a layman.

So, you're telling me my plan to measure atmospheric oxygen isotope trends over geologic time by grinding up sharks is bust?

There's a kind of half truth to that, in that a trait already developed is unlikely to simply disappear. Even if it becomes vestigial, it will probably stick around until something forces it out.

Thus we get whale and snake hips, ecidna eggs, human ear muscles, and so on. All can tell us of the conditions in the past, and it would usually be more difficult to remove them entirely as opposed to simply not getting very big.

Sound off, king. You got good points. :)