[Taxacom] Fw: More fairy tales from evolution

JF Mate aphodiinaemate at gmail.com
Thu May 30 19:51:37 CDT 2019


That is actually testable.

On Thu, 30 May 2019 at 12:05, Rob Smissen via Taxacom
<taxacom at mailman.nhm.ku.edu> wrote:
>
> Agreed. Put this in the "life floated here from another planet"basket of pointless hypotheses.
>
>
> ________________________________
>
>
> Evolution is definitely not a science. Its all about fairy tails (pun
> intended). Here's the latest. The sooner we get honest to good fairy tails
> (Creationism) in our schools the better. At least they are honest about
> miracles. Good grief.
>
> https://www.msn.com/en-us/news/technology/exploding-stars-led-to-humans-walking-on-two-legs-radical-study-suggests/ar-AAC25BS?li=BBnbcA1
> [https://img-s-msn-com.akamaized.net/tenant/amp/entityid/AAC2lLc.img?h=630&w=250&m=6&q=60&o=t&l=f&f=jpg]<https://www.msn.com/en-us/news/technology/exploding-stars-led-to-humans-walking-on-two-legs-radical-study-suggests/ar-AAC25BS?li=BBnbcA1>
> Exploding stars led to humans walking on two legs, radical study suggests - msn.com<https://www.msn.com/en-us/news/technology/exploding-stars-led-to-humans-walking-on-two-legs-radical-study-suggests/ar-AAC25BS?li=BBnbcA1>
> www.msn.com
> It was the evolutionary leap that defined the species: while other apes ambled around on all fours, the ancestors of humans rose up on two legs and, from that lofty position, went on to conquer ...
>
>
>
>
> According to the researchers, a series of stars in our corner of the Milky
> Way exploded in a cosmic riot that began about 7m years ago and continued
> for millions of years more. The supernovae blasted powerful cosmic rays in
> all directions. On Earth, the radiation arriving from the cataclysmic
> explosions peaked about 2.6m years ago.
>
> The surge of radiation triggered a chain of events, the scientists argue.
> As cosmic rays battered the planet, they ionised the atmosphere and made it
> more conductive. This could have ramped up the frequency of lightning
> strikes, sending wildfires raging through African forests, and making way
> for grasslands, they write in the Journal of Geology. With fewer trees at
> hand in the aftermath, our ancient ancestors adapted, and those who walked
> upright thrived.
>
> That, at least, is the thinking. In the history of human evolution, walking
> upright dates back at least 6m years to Sahelanthropus, an ancient species
> with both ape and human features discovered from fossil remains found in
> Chad. One prominent theory is that climate change transformed the
> landscape, leaving savannah where trees once stood.
>
> One of the study’s authors, Adrian Melott of the University of Kansas, said
> ancient human relatives were already dabbling with standing upright before
> the effects of any supernovae took hold. But he believes the violent
> explosions still played a role. “Bipedalism had already gotten started, but
> we think this may have given it a strong shot in the arm,” he said.
>
> “Lightning has long been thought to be the primary cause of fires before
> humans had a role, and with a lot of fires you get the destruction of a lot
> of habitat,” Melott said. “When the forests are replaced with grasslands,
> it then becomes an advantage to stand upright, so you can walk from tree to
> tree, and see over the tall grass for predators.”
>
> The cosmic rays from one star known to have exploded about 164 light years
> from Earth would have increased the ionisation of the atmosphere 50-fold,
> the scientists calculate. Cosmic rays ionise the atmosphere when they knock
> electrons out of the atoms and molecules they slam into in the air. Cosmic
> rays normally only ionise the upper reaches of the atmosphere, but powerful
> ones from nearby supernovae can penetrate the entire depth of the
> atmosphere, ionising it all the way to the ground. “We are sure this would
> have increased lightning strikes, but lightning initiation is not well
> understood, so we cannot put a number on it,” Melott said.
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