Dear Friends
the tremendous meteor impact causing the Cretaceous - Tertiary (K-T) or Cretaceous - Paleogene (K-Pg) extinction https://en.wikipedia.org/wiki/Cretaceous%E2%80%93Paleogene_extinction_event
inexplicably allowed excape to the extinction, although probably reduced to few individuals, to terrestrial and marine species, which survived also the severe environment conditions post - impact. The Palaeonthologic Temple of Shanghai http://m-polo.blogspot.de/2015/10/palaeonthology-temple-in-shanghai-1.html shows well the situation and the gradual transition from Palaeontology https://en.wikipedia.org/wiki/Paleontology to Zoology https://en.wikipedia.org/wiki/Zoology .
Salutations
Giancarlo
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