What was the first animal on earth?
The first animal on earth was a ocean drifting comb jellyfish. The scientist were so shocked because they didn't relise the first animal on earth would be so complex. It was so shocking that the scientist thought that they had gone wrong through the process of finding out what the first animal on earth was.
Comb jelly fish have connective tissues and a nervous system so that makes the comb jelly fish more complex than a sponge.
It was unexpected but because evolutionary biologists had thought that less complex animals split off and evolved separately first.
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