Mystery fossil site 'could be ancient maternity ward' : comp

Since the ichthyosaur bones in Nevada were excavated in the 1950s, paleontologists have investigated how all the creatures could have died together.

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Nevada , United States , Manchester , United Kingdom , Nicholas Pyenson , Randy Irmis , University Of Utah , University Of Manchester , Smithsonian National Museum Of Natural History , Smithsonian National Museum , Berlin Ichthyosaur State Park , Dean Lomax ,