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Offlinebarfightlard
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New Evolution Evidence
    #5503461 - 04/11/06 01:00 PM (17 years, 10 months ago)

http://www.shoutwire.com/viewstory/8910/...to_Land_Animals




"Fossil animals found in Arctic Canada provide a snapshot of fish evolving into land animals, scientists say.

The finds are giving researchers a fascinating insight into this key stage in the evolution of life on Earth.

US palaeontologists have published details of the fossil "missing links" in the prestigious journal Nature.

The 383 million-year-old specimens are described as crocodile-like animals with fins instead of limbs that probably lived in shallow water.

'Missing link'

Before these finds, palaeontologists knew that lobe-finned fishes evolved into land-living creatures during the Devonian Period.

But fossil records showed a gap between Panderichthys, a fish that lived about 385 million years ago which shows early signs of evolving land-friendly features, and Acanthostega, the earliest known tetrapod (four-limbed animals) dating from about 365 million years ago.

Infographic (BBC)

In 1999, palaeontologists Professor Neil Shubin, from the University of Chicago, and Professor Edward Daeschler, from the Academy of Natural Sciences in Philadelphia, set out to explore the Canadian Arctic in an attempt to find the "missing link" that would explain the transition from water to land.

After several years of searching with very little success, they hit the jackpot in 2004.

"The really remarkable find came when one of the crew found a snout of a flat-headed animal sticking out of the side of a cliff - that is totally what you want to find because if you are at all lucky the rest of the skeleton is back in the cliff," said Professor Shubin.

The team found three near-complete, well-preserved fossils of the new species, Tiktaalik roseae, in an area of the Arctic called the Nunavut Territory. The largest measures almost 3m (9 ft) in length.

"When we got back into the lab we removed the rock from the bone, and we began to find some really significant stuff," Professor Shubin told the BBC news website.

Crocodile-like

The creature shares some characteristics with a fish; it has fins with webbing, and scales on its back.

But it also has many features in common with land animals. It has a flat crocodile-like head with eyes positioned on top and the beginnings of a neck - something not seen in fish.

"When we look inside the fin, we see a shoulder, we see an elbow, and we see an early version of a wrist, which is very similar to that of all animals that also walk on land," said Professor Shubin.

Artist's impression of fish (National Geographic)
The scientists think the creature lived in the shallows

"Essentially we have an animal that is built to support itself on the ground."

The scientists believe the position of the creature's eyes suggest it probably lived in shallow water.

"We are capturing a very significant transition at a key moment of time. What is significant about the animal is that it is a fossil that blurs the distinction between two forms of life - between an animal that lives in water and an animal that lives on land."

Dr Andrew Milner, a palaeontologist from the Natural History Museum, UK, said it is unusual to find a fossil like this in such good condition.

"This material is amazing because it includes a nearly complete skeleton - which is always handy because instead of assembling the fossil from bits we can see the whole skeleton and be sure that this is how the animal was put together."

Professor Jennifer Clack, from the University of Cambridge, said that the find could prove to be as much of an "evolutionary icon" as Archaeopteryx - an animal believed to mark the transition from reptiles to birds.

"The discovery of the Tiktaalik gives hope of equally ground-breaking finds to come," she said.

A cast of one of the fossils will be on display at the Science Museum in London from Thursday."


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OfflineGomp
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Re: New Evolution Evidence [Re: barfightlard]
    #5505046 - 04/11/06 07:39 PM (17 years, 10 months ago)

Funny, there are many fish that walk on the sea floor, and the anaconda has a pelvis, I think.. so it is really not a far way to go, to say we all are evolving..

Great topic! :laugh:


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Offlinebarfightlard
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Re: New Evolution Evidence [Re: Gomp]
    #5505414 - 04/11/06 08:38 PM (17 years, 10 months ago)

I didn't know that hmm. What could be next for us


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"What business is it of yours what I do, read, buy, see, say, think, who I fuck, what I take into my body - as long as I do not harm another human being on this planet?" - Bill Hicks


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OfflineShroomDoom
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Re: New Evolution Evidence [Re: barfightlard]
    #5510017 - 04/12/06 09:40 PM (17 years, 10 months ago)

i hope we evolve more spiritually than physically. i think we have all the stuff we need physically so why not evolve our minds? a species that evovled telpathic communication, now that would be impressive.


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OfflineStoned_Druid
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Re: New Evolution Evidence [Re: barfightlard]
    #5510800 - 04/13/06 12:32 AM (17 years, 10 months ago)

Interesting stuff.


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"Sanity is for the Weak"



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InvisibleWIZOLZ
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Re: New Evolution Evidence [Re: Stoned_Druid]
    #5511260 - 04/13/06 06:37 AM (17 years, 10 months ago)

Its incredible to exsist now, at this stage in our evolutionary progress, gaining insight and scientific data into our pre-evolved world and peiceing together the mysteries which surround it. I can only hope that we dont over determine or disatrously screw things up while experimenting. In relation to this amazing discovery, which doesnt seem all that profound (Dont otters and other aquatic mammels have cababilties to live on land?) you should read through this post. http://www.shroomery.org/forums/showflat...273e81ac28fb86a

THATS some crazy thinking !!


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Requim for a Dream - Paul Oakenfold
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"The mis/abuse of any form of power, is the worst form of ignorance"
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WIZOLZ - Lover with a Killer's Smile


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