Iron Pyrite Nautilus specimen. They swam the Jurassic seas around 185 million years ago but autilus are still alive today, which is possibly the most striking aspect of all this
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These microscopic beauties were floating around in the ocean with the nautilus back then... and still thrive today also.
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This is a fossil coccolithophore. They are single-celled, photosynthetic phytoplankton. The preserved skeleton you see here is made of calcium carbonate. They are *extremely* abundant in todays oceans, and a main recipient of CO2. The scale bar at bottom right is 1 micron.
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