Thursday, April 20, 2017

Explaining Where the Mammoths Went - Science

Often called the Pleistocene Extinction, many of the coolest animals such as mammoths in America and all manner of fauna died out.  This happened only ten to fifteen thousand years ago so humans definitely saw it.  Moreover, many theorize self-awareness came to humans about forty thousand years ago.  There was no intellectual difference between they and we after that time; they just didn't know about Facebook.

However, scientists today don't know for sure what wiped out those animals and was it really humans.

Studies of bones from Ice Age megafaunal animals across Eurasia and the Americas have revealed that major increases in environmental moisture occurred just before many species suddenly became extinct around 11-15,000 years ago. The persistent moisture resulting from melting permafrost and glaciers caused widespread glacial-age grasslands to be rapidly replaced by peatlands and bogs, fragmenting populations of large herbivore grazers.  (Science Daily:  Megafaunal extinctions driven by too much moisture)

Calving of a glacier

Credit: © hakat / Fotolia

Watching the ongoing post-Ice Age melting.

Using 511 radiocarbon dated bones from animals such as bison, horse, and llamas the team was able to investigate the role of environmental change in the mysterious megafaunal extinctions, which claimed the vast majority of existing large land animals such as giant sloths and sabre-toothed cats.

"We didn't expect to find such clear signals of moisture increases occurring so widely across all of Europe, Siberia and the Americas," says study leader Professor Alan Cooper, ACAD Director. "The timing varied between regions, but matches the collapse of glaciers and permafrost and occurs just before most species go extinct.

- SD

The interested student is invited to pursue the article further but I tell you in advance it will confirm their great confidence this is what did it.

How about I flip it now to tell you that's rubbish and the Pleistocene Extinction was actually caused by the strike of a meteorite, a really big one.  In that research, they showed how there was a fine layer of Platinum (possibly as I don't recall the exact element) spread over extremely large areas and the only way scientists have been able to theorize that happening is a meteorite strike.

Just as with the current article, the summary concluded with the observation of an elegant proof since it's provided by direct archeological evidence, the scope is shown by the spread of it, and the consequence is such a strike is generally known.

Note: an article about that meteorite strike is on Ithaka somewhere but, regrettably, only Google search would have much chance of finding it.  Saying Google is good at indexing its blogs is like saying how about we send Donald Trump to represent America on the chess team.

The only point from the video which is germane to the article is question everything ... plus it's funny.  Science isn't bullshit, by any means, but always question that as well.  There's truth in the aggregate and that's why peer reviews is so vital.  Solo science just winds up in creationist posers telling us dinosaurs once ran at the Kentucky Derby.  We want it real; question everything.

Here's an overview of the Pleistocene Extinction with a cross-comparison of possible causes and this is when you want to question everything ... a lot.  (WIKI:  Quaternary extinction event)

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