'Ghost' fossils preserve haunting record of ancient life on a hellish Earth - Livescience.com

Geometric fossils in marine sediments have a story to tell.

Ghostly imprints of tiny plankton-like creatures have been found haunting the sediments of prehistoric oceans at a time when such organisms were thought to be extinct. The so-called nannofossil impri… [+4669 chars]

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