A 50-million-year-old school of fish etched forever in this rare fossil


fish shoal close up

Megapixels: The ancient rock offers a glimpse of how this freshwater species behaved in unison.

It’s not clear what overtook this school of fish, but the remnant—an untimely demise etched in a limestone slab for all eternity—is a breathtaking glimpse of ancient…
via Popular Science "http://bit.ly/2WkMYTN"

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