07-12-2022, 01:58 AM
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Senior Member
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Join Date: Mar 2017
Location: ABQ, New Mexico
Posts: 36,633
Thanks: 3,506
Thanked 136,542 Times in 22,784 Posts
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How old are we? How far back can we trace our development?
The answer: 500 million years.
This creature lived on Earth, in her seas. Why is it this particular creature? Because this is the first creature with a backbone. It's called a Yunnanozoan
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