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Bryson, Bill - On Extinction

Identifier

018662

Type of Spiritual Experience

Background

So far, geologists have managed to identify 5 major extinction events, which caused major removals of life forms.

A description of the experience

Bill  Bryson - A Short History of Nearly Everything

… The Earth has seen 5 major extinction episodes in its time – the Ordovician, Devonian, Permian, Triassic and Cretaceous, in that order – and many smaller ones. 

The Ordovician (440 million years ago) and Devonian (365 million) each wiped out about 80 to 85% of species. 

The Triassic (210 million years ago) and Cretaceous (65 million) each wiped out about 70 to 75% of species. 

But the Permian extinction of about 245 million years ago … wiped out 95% of animals known from the fossil record. 

Altogether on land and water it is thought the earth lost 52% of its families – that's the level above genus and below order on the grand scale of life and perhaps as many as 96% of all its species.

The source of the experience

Bryson, Bill

Concepts, symbols and science items

Symbols

Activities and commonsteps

Activities

Suppressions

Being left handed

Commonsteps

References