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Oxygen levels were key to early animal evolution, strongest evidence now shows
Science Daily ^ | 9/23/2016 | University College London

Posted on 09/23/2016 3:50:31 PM PDT by JimSEA

It has long puzzled scientists why, after 3 billion years of nothing more complex than algae, complex animals suddenly started to appear on Earth. Now, a team of researchers has put forward some of the strongest evidence yet to support the hypothesis that high levels of oxygen in the oceans were crucial for the emergence of skeletal animals 550 million years ago.

The new study is the first to distinguish between bodies of water with low and high levels of oxygen. It shows that poorly oxygenated waters did not support the complex life that evolved immediately prior to the Cambrian period, suggesting the presence of oxygen was a key factor in the appearance of these animals.

'Although there is geochemical evidence for a rise in oxygen in the oceans around the time of the appearance of more complex animals, it has been really difficult to prove a causal link. By teasing apart waters with high and low levels of oxygen, and demonstrating that early skeletal animals were restricted to well-oxygenated waters, we have provided strong evidence that the availability of oxygen was a key requirement for the development of these animals. However, these well-oxygenated environments may have been in short supply, limiting habitat space in the ocean for the earliest animals.'

(Excerpt) Read more at sciencedaily.com ...


TOPICS: Science
KEYWORDS: catastrophism; evolution; geology; globalwarminghoax; godsgravesglyphs; greennewdeal; life; oxygen
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"The researchers found that levels of elements such as cerium and iron detected in the rocks showed that low-oxygen conditions occurred between well-oxygenated surface waters and fully 'anoxic' deep waters. Although abundant in well-oxygenated environments, early skeletal animals did not occupy oxygen-impoverished regions of the shelf, demonstrating that oxygen availability (probably >10 micromolar) was a key requirement for the development of early animal-based ecosystems."

More evidence for the expansion of livable, oxygenated ocean regions behind the so called Cambrian explosion. Evolution has its place in this relatively rapid life form expansion and the key is oxygen.

1 posted on 09/23/2016 3:50:31 PM PDT by JimSEA
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To: JimSEA
"Evolution has its place in this relatively rapid life form expansion and the key is oxygen gullible humans." Easy one.
2 posted on 09/23/2016 3:54:51 PM PDT by Fungi (Soy sauce, you want soy sauce? Enjoy your soy sauce with all the fungi in it!)
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To: Fungi

OMG!! People who believe in Evolution are ATHEISTS!


3 posted on 09/23/2016 3:59:22 PM PDT by Ann Archy (Abortion....... The HUMAN Sacrifice to the god of Convenience.)
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To: Fungi

Well, you’re coming around a bit. You used the term “life form expansion” and didn’t say everything happened in 6,000 years.


4 posted on 09/23/2016 4:00:18 PM PDT by JimSEA
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To: JimSEA

Wow, it never occurred to me that animals needed oxygen. What’ll they think up next?


5 posted on 09/23/2016 4:00:33 PM PDT by Tax-chick (The coming of a Cthulhu presidency will be heralded by a worldwide wave of madness.)
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To: JimSEA

Around to what?


6 posted on 09/23/2016 4:01:05 PM PDT by Fungi (Soy sauce, you want soy sauce? Enjoy your soy sauce with all the fungi in it!)
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To: JimSEA

Read this, you might “come around.”
https://archive.org/details/implicationsofev00kerk


7 posted on 09/23/2016 4:03:37 PM PDT by Fungi (Soy sauce, you want soy sauce? Enjoy your soy sauce with all the fungi in it!)
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To: JimSEA

Was that the only difference in the purported habitat?


8 posted on 09/23/2016 4:12:36 PM PDT by Getready (Wisdom is more valuable than gold and diamonds, and harder to find.)
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To: Fungi

Amazing that seemingly intelligent people would believe that all of this was just random chance.


9 posted on 09/23/2016 4:15:17 PM PDT by Chainmail (A simple rule of life: if you can be blamed, you're responsible.)
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To: Chainmail

Bingo! Yes, atheists have a god, it is called chance.


10 posted on 09/23/2016 4:16:57 PM PDT by Fungi (Soy sauce, you want soy sauce? Enjoy your soy sauce with all the fungi in it!)
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To: JimSEA

Is this some kind of magician’s trick, look at this hand, not that hand?

The problems in evolutionary theory go a bit beyond oxygen.


11 posted on 09/23/2016 4:17:45 PM PDT by lurk (TEat)
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To: Chainmail

Just a quick post to explain why atheism requires as much faith, if not much more, than a theist.

All atheists posit what’s called a universal negative. A universal negative requires absolute knowledge (omniscience) whereas a universal positive may not require that.

For instance, let’s say I am in a building with 4 rooms, and I have only been in 1 room. In order to say that every room is empty, I would have to have knowledge of all 4 rooms. I would need to know the entirety of what I am claiming to know.

However, to state the opposite, that the building is not empty, I would at the very least only need to know about one room.

So, in essence, any time an atheist claims that there is absolutely no God, they are claiming absolute and full knowledge of the universe (omniscience). If they are not claiming absolute knowledge, than they are going off of faith, but in fact, since they could never EVER know for sure that universal negative, then they are requiring much more faith than a person who claims there is a God (because finding out if there is a God may not require absolute knowledge).

But hey, I don’t need to say it, it was written quite a long time ago “the fool says in his heart ‘There is no God’” (Psalm 14:1)


12 posted on 09/23/2016 4:20:08 PM PDT by Flavious_Maximus
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To: JimSEA

.
Evolution maintains its place in the trash can full of loser theories.

(alongside its promoters)
.


13 posted on 09/23/2016 4:20:11 PM PDT by editor-surveyor (Freepers: Not as smart as I'd hoped they'd be)
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To: JimSEA

The ignorant smartypants remarks you are receiving are an embarrassment to conservatism.


14 posted on 09/23/2016 4:23:12 PM PDT by Moonman62 (Make America Great Again!)
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To: Flavious_Maximus

That was very awesome.


15 posted on 09/23/2016 4:23:22 PM PDT by nesnah (Liberals - the petulant children of politics)
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To: JimSEA

It has long puzzled scientists why, after 3 billion years of nothing more complex than algae, complex animals suddenly started to appear on Earth.

...

Can’t this be taken that complex life is rare?


16 posted on 09/23/2016 4:25:59 PM PDT by Moonman62 (Make America Great Again!)
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To: Tax-chick

They need water...


17 posted on 09/23/2016 4:28:10 PM PDT by EEGator
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To: JimSEA

I noticed long ago a correlation between the trailing off of banded iron formations (which were oxygen sinks) and the emergence of more complicated life forms.


18 posted on 09/23/2016 4:29:22 PM PDT by dirtboy
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To: JimSEA

That, plus the climate settled at one optimal temperature and hasn’t budged since 1970.


19 posted on 09/23/2016 4:30:42 PM PDT by Larry Lucido
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To: Fungi

Bingo! Yes, atheists have a god, it is called chance.

The chance of the first simple cell assembling itself is something like 1 times 10 to the 600th power therefore atheists believe it big numbers. They are polytheists.


20 posted on 09/23/2016 4:34:03 PM PDT by mountainlion (Live well for those that did not make it back.)
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