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anyanavicka [17]
3 years ago
9

What happened around 500 million years ago?

Biology
2 answers:
mafiozo [28]3 years ago
4 0
I was told plankton made the earths atmosphere breathable but probs wrong
Romashka-Z-Leto [24]3 years ago
4 0
510 million years ago was the Cambrian Explosion occurred, when all animal phyla appeared in fossil record.
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