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originally posted by: strongfp
a reply to: Milkweed
Because they don't fit within the typical evolutionary path that almost all living creatures do.
Their DNA is just strange and it appears they are 'alien', but they most definitely did evolve here on earth. Why? Because they share similar DNA and RNA sequencing with other creatures just like them.
It still brings the question tho, why did they evolve that way, they seem to be drastically different.
And what if they did come from space and some how evolved with earth creatures. They seem to adapt to their environment within seconds.
originally posted by: howtonhawky
a reply to: reject
They can change their dna also...
It is claimed that the critter is the only earthling that can do so.
Indeed. It seems that octopus diverged from squids about 270 million years ago. Well after the Cambrian explosion and hardly a "sudden" appearance.
Why? Because they share similar DNA and RNA sequencing with other creatures just like them.
Using a relaxed molecular clock, we estimate that the octopus and squid lineages diverged ∼270 Mya, emphasizing the deep evolutionary history of coleoid cephalopods8,30