Quote Originally Posted by HalfTangible View Post
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The oldest person whose age we know of in erfworld is a little more than a thousand turns old, and a turn lasts a day. So... 3 or 4 years old.

Nobody in Erfworld is 'ancient'. Even the long-lived die long before they could be considered 'ancient' for our world.
There's also the fact that units pop already "adult".