Vertebrate world, say hello to your Uncle Amphioxus!! Or maybe not...
Once thought to be one of the first creatures to possess a vertebrate like substance, amphioxus has over time grown out of favor in the scientific community. Now, it is thought that cephalopods may be closer to humans that previously thought.
Just as a plus, be sure to watch this video in which two guys sing a (now factually inaccurate) song from the early 20th century about amphioxus.
It's a long, long way from amphioxus,
But we all came from there!
It wasn't much to look at, and it scarce knew how to swim.
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