"Older than dirt" not really that old in the grand scheme of things


#1

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#2

Dirt in my neighborhood of Puget Sound, scoured to the bedrock by the last glaciation, is less than 15,000 years old.


#3

A co-worker of mine commonly uses the expression "since dirt was clean". I'm guessing that would predate the appearance of life on Earth, which would be pretty old.


#4

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