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A current moved this prehistoric ammonite’s lifeless shell across the seafloor, producing an almost 28-foot-long fossilized scratch. 

May 17, 2017
The Scientist Staff

A digital model of the drag left by a deceased ammonite (Subplanites rueppellianus) along with its fossilized remains, created using 645 photographs. Fossil and mark were found near Solnhofen in Southern Germany. 

DEAN LOMAX

       (See D.R. Lomax et al., “An 8.5 m long ammonite drag mark from the Upper Jurassic Solnhofen Lithographic Limestones, Germany,” PLOS ONE, doi:10.1371/journal.pone.0175426, 2017.)

January 2019

Cannabis on Board

Research suggests ill effects of cannabinoids in the womb

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