Study reveals mass extinction event 35 million years ago

Study reveals mass extinction event 35 million years ago
The Underwoodisaurus gecko has a clear scale over its eyes to prevent water loss; but it can't blink, so it licks its eye clean. Credit: Stuart Hay, ANU

Australian National University biologists have found the first evidence of mass extinction of Australian animals caused by a dramatic drop in global temperatures 35 million years ago.

This period of intense and occurred at the same time when Australia separated from Antarctica.

Lead researcher ANU PhD student Ian Brennan said the team detected the of pygopodoid by using molecular evolutionary methods to examine fossil records.

"The dramatic shift to colder and drier climates likely resulted in rapidly changing Australian habitats, which hugely impacted the animals that inhabited them," said Mr Brennan from the ANU Research School of Biology.

"Our research provides evidence that rapid shifts in may have profound and long-lasting effects on global biodiversity."

Mr Brennan said findings also suggested the emergence and spread of deserts in Australia from about 10 million years ago provided ideal habitat for new pygopodoid gecko species to prosper.

"Our findings suggest that arid regions of Australia have acted as a cradle for geckos, promoting the rich gecko diversity that is found across the continent," he said.

Co-researcher Dr Paul Oliver said geckos did well in the harsh climates of arid Australia because they avoided the heat by being nocturnal.

Credit: Australian National University

"Many desert geckos also have strategies and attributes to avoid water loss, such as having relatively rugged skin and scales," he said.

"The clear scale over the eye, called a spectacle or brille, is one such example of this, as it helps them avoid from the surface of the eye. But that means they can't blink, so they have to lick it clean.

"Underwoodisaurus and their relatives Nephrurus have little 'eyebrows' that stick out to keep dust and dirt off their eyes, because they're burrowing species."

The pygopodoid geckos are a group of about 150 species found across Australia.


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Ancient gecko shines light on Australian desert origins

More information: Ian G. Brennan et al. Mass turnover and recovery dynamics of a diverse Australian continental radiation, Evolution (2017). DOI: 10.1111/evo.13207
Journal information: Evolution

Citation: Study reveals mass extinction event 35 million years ago (2017, March 23) retrieved 13 October 2019 from https://phys.org/news/2017-03-reveals-mass-extinction-event-million.html
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Mar 23, 2017
by using molecular evolutionary methods to examine fossil records

Unfortunately the clock seems to be off a bit. By about 34.994 million years.
The one definite geological disaster that we can find ample evidence of happened about 4000 years ago - the global flood, which caused mass extinctions of every living bird, animal, creeping thing and human being on earth. Except for those in the ark.

The cataclysm broke up and shifted the continents from a single land piece into the many we see today. The volcanic activity and other processes heated the waters of the earth to much higher temperatures than what we encounter today. As a result the cooling vapor and water temperature brought about the one ice age that did occur. So there was a major extinction followed by a minor one during the ice age a few hundred years later.

If you disagree, please supply another plausible cause for the extinctions evolutionists preach about as well as the ice ages. None will be found.

Mar 23, 2017
The one definite geological disaster that we can find ample evidence of happened about 4000 years ago - the global flood, which caused mass extinctions of every living bird, animal, creeping thing and human being on earth. Except for those in the ark
Just think - if your monster god wouldve written the bible a few millenia earlier he wouldnt have had to murder an entire planet. I wonder if he actually chose the latter or if the book didnt occur to him until later?

(Thank god it didnt really happen eh?)
If you disagree, please supply another plausible cause for the extinctions
Well we know for sure it wasnt the flood because evidence tells us it never happened.

So it mustve been something else.

Mar 23, 2017
If you disagree, please supply another plausible cause for the extinctions evolutionists preach about as well as the ice ages. None will be found.

If you actually read and understand the article you commented on, you will find some of the information you seek.

Mar 23, 2017
" the global flood, which caused mass extinctions of every living bird, animal, creeping thing and human being on earth. Except for those in the ark."
------------------------------------

Okay, folk, . . who brought the Syphilis?

Mar 23, 2017
Warming kills
Cold doesn't

Thats why we prefer glaciation to global warming.

FredJose is a tard. The evidence is immense. His problem is the bible is his only evidence

Mar 23, 2017
The drying and cooling did come about due to a flood. What happened was this: The South Tasman Rise was a land bridge connecting Antarctica to Tasmania and Australia. It was stretched and sunk beneath the waves. The South Tasman Rise became a flooded lost land. This allowed the Antarctic Circumpolar Current to start. This cut off warm currents circulating that kept heat flowing to Antartica and the souther parts. Cold sea would have meant less evaporation. So therefore less humid air for rain.

Mar 23, 2017
Interesting, this seems to indicate that some 2 million years separates this extinction event from the Eocene-Oligocene extinction event in the Northern Hemisphere. This implies that the events were connected indirectly.

Mar 25, 2017
FredJose confuses discussion of evidence with preaching. Classic projection of one's own foibles on others.

Mar 26, 2017
Climate Change deniers of Human causation, are mainly paid shills for polluting industries and primitive savages worshiping ignorance.

A common accusation is that errors in data collection, confusion with conflicting evidence and some sloppy analysis from decades ago. Render all research to date and into the future, null and void.

Completely Ignoring that scientists have continued to develop better technology to improve collecting evidence. Plus improving their methodology for analyzing data with steadily improved ethical standards.

While the polluters paid shills continue to dig up and reuse the same zombie propaganda developed by the tobacco industry. And the flatearther religious, bombast with the anti-science spewings of con-artist fake-scientists.

Since prior errors, mistakes and fraud invalidate more recent scientific evidence? I charge that the thousands of misprints of missed-interpretations of the bible is proof that all religious belief is wrong, null & void.

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