Ologies with Alie Ward cover image

Geology (ROCKS) Part 1 with Schmitty Thompson

Ologies with Alie Ward

00:00

Do You Have a Rock Tumbler?

Animals with skeletons didn't exist until about 550 million years ago. Paleontologists now think fish could grab and store more calcium and phosphorus in osteocites. The original purpose of these bone cells was to act as batteries for long journeys. You might be driving past outcrops and road cuts of rocks older than bones, older than bones.

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