A brief note on ammonite extinctions

Ammonites, one of the most recognisable fossil shells of the earth's pre-history, Ammonites reigned supreme in their habitat for hundreds of millions of years from the Devonian period bracketing 417-354 million years ago, surviving several mass extinctions of the earth's history, until finally falling away from the fossil record at the end of the Cretaceous period coinciding with the extraordinary 'KT boundary' extinction...

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