xianghua
Well-Known Member
The Cambrian explosion led to a lot of different life forms, but was not unusually fast.
The Pikaia shown below is about the closest thing to human found in the Cambrian.
dont be so sure:
Pikaia - Wikipedia
"Molecular studies have refuted earlier hypotheses that lancelets might be the closest living relative to the vertebrates, instead favoring tunicates in this position"
pikaia also had about up to 9 gill slits were a modern fish has in general only one. so in some terms this fish is even more complex then a modern one.
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