12,890 year old ‘cosmic impact’, ice core platinum laden

 

“A layer of platinum from an ice core taken from Greenland has been dated back to the time of a known abrupt climate transition.” Source: Daily Mail

Daily Mail has this report by Ellie Zolfagharifard.  The headline states, “A comet DID wipe out first North American prehistoric humans: Ice core data suggests a cosmic impact killed off Clovis people.”

Zolfagharifard reports:

A cosmic impact 12,900 years ago could have led to the demise of the ‘Clovis’ people of North America, researchers claim.

A layer of platinum from an ice core taken in Greenland has been dated back to the time of a known abrupt climate transition, known as the ‘Big Freeze’.

The freeze has been previously been linked to the demise of the Clovis people, the prehistoric hunter gatherers who were the first to occupy North America.

According to researchers at Harvard University, this provides evidence that a comet tipped the world into its colder phase, making dozens of species extinct.

Researcher Michail Petaev and Harvard colleagues, writing in the journal Proceedings of the National Academy of Sciences, found a 100-fold increase in platinum concentration in ice that is around 12,890 years old.

This is the same period for which oxygen isotope measurements show rapid cooling of the climate- a period known as the ‘Younger Dryas’.

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