This 20 January 2017 Dutch video is about fossils in stones in the inner city of Utrecht. Including brachiopods, sponges and coral.
Paleontologists investigating the sea bed off California have discovered a lost ecosystem that for thousands of years had nurtured communities of scallops and shelled marine organisms called brachiopods. They had died off by the early 20th century, replaced by the mud-dwellling burrowing clams that inhabit this seabed today: here.
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