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cyghost

cyghost

Executive Member
Joined
May 9, 2007
Messages
6,394
Phronesis said:
Except of course if they do not happen to agree with your metaphysics...
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having no metaphysics, I can't pretend to understand whatever you mean. you'll have to be clearer.
Lol, you just can't stop can you...
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inderdaad ~ ek volg jou voorbeeld getrou tot die bittereinde.
 
rwenzori

rwenzori

Honorary Master
Joined
Feb 17, 2006
Messages
12,360
Phronesis said:
I think you should expose this Techne character, he plagiarized my threads as well.
Hey, here is something mysterious...
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Hence my syndication accusation. Who writes all of this for your little ID army, for you to defend in badly written English? What other names/nicks do you use and where do you post?

Your picture is an illegible fuzzy blur, in the manner of your thinking. Take a lesson or two in how to post a screenshot.
 
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Phronesis

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Oct 6, 2008
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rwenzori said:
Not answering my question again? Where else can us swine pick up your cast pearls?
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A gift to your conspiracy sensing, stalking nature. Get new spectacles and follow the rabbit hole, you are on your own here bubba :D.
 
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Phronesis

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Early oceans had oxygen-loving life
Simple, photosynthesising life forms created an excess of oxygen in the oceans 700 million years earlier than previous estimates suggest, an international team of geologists claim.

The research, published today in the journal Nature Geosciences, pushes back the earliest appearance of photosynthesising organisms from 2.7 to 3.46 billion years ago.

Microscopic organisms such as cyanobacteria create oxygen as a by-product of photosynthesis.

The timing of their first appearance is hotly debated as it provides clues as to how early life on earth evolved.

Crystallised in time

Until now, the earliest evidence of photosynthesis was microscopic fossils found in shale rocks in Western Australia dating from 2.7 billion years ago.

Now a team of Japanese, US and Australian scientists, led by Dr Masamichi Hoashi of the Kagoshima University, Japan, have found evidence for oxygen in ancient sea water from marine sedimentary rocks in the Pilbara region of Western Australia.

The evidence comes from tiny crystals of the iron-oxide mineral haematite in a 160-metre-long core section that forms part of the Marble Bar Chert.

Haematite can form in the presence of aerobic (oxygen-loving) bacteria in the water, or by photo-electric processes in the upper 10 metres of seawater.

The researchers say haematite crystals in the Marble Bar Chert formed in water at least 200 metres deep, because microscopic analysis of the rocks show no sign of wave action or other structures characteristic of shallow-water sediments.

The orientation and nature of the grains of haematite also show that it precipitated directly from the seawater, rather than forming later from other processes, such as the movement of groundwater, they add.

"These data strongly suggest that oxygenic photoautotrophs flourished in the photic zone of the 3.46 [billion-year-old] oceans and supplied molecular oxygen to the deep water," the researchers write.


Billion year gap

Geologist Professor Malcolm Walter, from the University of New South Wales in Sydney, says the research represents a "significant development", but presents a dilemma as previous research suggests a much later date for the evolution of photosynthesis.

Evidence from uranium deposits and iron-rich rocks in the nearby Hammersley region of Western Australia point to the earth's atmosphere and oceans first becoming oxygenated around 2.4 billion years ago.

"[The researchers] want to suggest that photosynthesis must have evolved before 3.5 billion years ago, and that despite that, it took one billion years to oxygenate the surface of the earth. That's hard to reconcile with what we know about how this sort of bacteria would have spread," says Walter.

But researcher Professor Hiroshi Ohmoto from the NASA Astrobiology Institute and Department of Geosciences at the Pennsylvania State University says other data backs their claim for an early development of photosynthesising life.

"Recently accumulated massive amounts of geochemical and biochemical data can be better explained by a theory postulating the emergence of oxygenic photosynthesis and the development of a fully oxygenated atmosphere in the very early evolutionary stage," says Ohmoto.

"Once cyanobacteria appeared in one area of the ocean, it probably took less than 10 million years to fully oxygenate the atmosphere and oceans."
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Very early on emergence of oxygen synthesizers plugging away doing what they do best... making oxygen.
Tool kits for body plans and multicellularity present waaaay before the emergence these.
A little extra atmospheric oxygen unlocked the signaling capabilities of hedgehog proteins (involved in multicellular signaling and emergence of body plans).

The future had it coming :cool:.
 
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Phronesis

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alloytoo said:
Yeah, all those mass extinctions and HGT's just played right into the front loaders noodles.
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Mass extinction? Earth is not heaven :confused:. Although it can be seen as a method of optimization.
HGT. Another way of optimization. After all, ERVs can be seen as vectors of optimization.
 
alloytoo

alloytoo

Honorary Master
Joined
Sep 12, 2006
Messages
12,486
Phronesis said:
Mass extinction? Earth is not heaven :confused:. Although it can be seen as a method of optimization.
HGT. Another way of optimization. After all, ERVs can be seen as vectors of optimization.
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100% his noodlyness squirts them into the human genome at just the right spot at just the right time.

Just like FSM planned it......RAMEN.
 
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Phronesis

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Phew, yet again civil constructive discussion went down the drain :rolleyes:. Are you going to stop?
 
alloytoo

alloytoo

Honorary Master
Joined
Sep 12, 2006
Messages
12,486
Phronesis said:
Phew, yet again civil constructive discussion went down the drain :rolleyes:. Are you going to stop?
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We've long since abandoned the illusion that you can conduct a civil honest discussion.

I believe you have the infractions to prove it.
 
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