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user posted image rA 15-year search for fossils in Africa has led to the discovery of eight fish specimens that are 450 million years old – 50 million years older than any previous fish fossil on the continent and amongst the oldest in the world. Professor Richard Aldridge, of the Department of Geology at the University of Leicester, who co-led the scientific expedition, says the fossil discovery is among the most remarkable and exciting ever to be found on the continent. He said: ‘These exciting fossils help to fill in a ‘missing link’ in the evolutionary history of the very early fishes. They are new to science, and we have yet to describe them and to give them a scientific name.’ Scientists working on fossils in the Cedarberg Mountains around Clanwilliam, South Africa, unearthed the ancient remains of forms that represent the evolutionary stage before the fishes had any skeleton at all. The scientific team, led by Professor Aldridge of the University of Leicester and Dr Hannes Theron of the University of Stellenbosch, South Africa, has been working on these deposits for fifteen years and many remarkable fossils have been recovered.

Professor Aldridge said: “These new fish finds are among the most exciting ever. People may wonder how we know that these fossils are fishes, when we have no bones with which to identify them. The answer is that the exceptional preservation displayed in these rocks enables us to recognise the eyes, scales and even the liver of the animals. The impressions in the shale are very faint, but they are also very clear and diagnostic.”

user posted image View: Full Article | Source: Innovations Report
liljellybean
I seroiusly don't believe that anything can be that old. I mean, for millions of years we weren't here and then we are? No way. innocent.gif
whoa182
they are talking about fish, what you mean we?
Amalgamut
450 million years old.

Man, thats old.
blazer2004
450 mill my butt they like to make up these numbers cause they dont know what they are talking about
Mr. Blonde
Does this mean those Disney movies were right? Along with the Dilbert intro? Really? But if so thats amazing. If we can scientificly proove we evolved from cells or whatever into bacteria into fish then on and on; cant we not instantly dismiss god? I watched a 2 hour long thing on the teeeeveeee which it showed how the earth went through all of its changes and how theres water with bacteria or some measly forms of live from hundreds of millions of years ago. Would that tie in?
whoa182
QUOTE(blazer2004 @ May 1 2005, 05:02 AM)
450 mill my butt they like to make up these numbers cause they dont know what they are talking about
[right][snapback]599592[/snapback][/right]


eeeerrrrrrrrr ok blink.gif
AztecInca
This planet does indeed have many secrets that we haven`t even scratched the surface of yet. For many years to come we will discover more and more about this amazing planet we call home!
Purplos
QUOTE(Mr. Blonde @ May 1 2005, 02:02 AM)
If we can scientificly proove we evolved from cells or whatever into bacteria into fish then on and on; cant we not instantly dismiss god?
[right][snapback]599631[/snapback][/right]



Many people believe in both god and evolution. IMO, nothing will dismiss the idea of God, just like nothing will prove his existance.
SilverCougar
QUOTE(blazer2004 @ May 1 2005, 05:02 AM)
450 mill my butt they like to make up these numbers cause they dont know what they are talking about
[right][snapback]599592[/snapback][/right]


And you obviously have had the amount of classes and training, and study that these guys have so you clearly know what you're talking about, right? rolleyes.gif
Bone_Collector
I'm really beginning to doubt the carbon dating techniques used to determine the age of a fossil. hmm.gif
whoa182
user posted image

Fossils illuminate fish evolution

Fossils of an ancient fish - dating back 450 million years, when the creatures had neither bones nor teeth - have been found in South Africa.
The finds, which are 50 million years older than any other fossil fish in Africa, will help provide a "missing link" in the evolution of early fish.

The first of eight fossil specimens was dug up in 1994, and named "Nelson" after the newly elected president.

The research is being conducted by a UK-South African team of scientists.

"These new fish finds are among the most exciting ever," said Richard Aldridge of the University of Leicester. "People may wonder how we know these fossils are fishes, when we have no bones with which to identify them.

"The answer is that the exceptional preservation displayed in these rocks enables us to recognise the eyes, scales and even the liver of the animals. The impressions in the shale are faint, but they are also clear and diagnostic."

Nelson

Professor Aldridge and his team have been working on the deposits in the Cedarberg Mountains, South Africa, for 15 years.

After finding Nelson, the team had to wait another 11 years before they found, amazingly, seven additional specimens in quick succession.

The animals lived in a time when Africa was in an ice age, and before any animals had colonised the land. According to the team, they lived in a shallow sea fed by melt waters from receding ice-sheets.

Although the researchers are still in the early stages of analysing the fossils, they think the fish might have been swimming scavengers.

"They had no teeth, so they might not have been predators," Professor Aldridge told the BBC News website. "They may have been scavengers - they would have fed on detritus probably.

"But they certainly could swim. The bottom conditions in this sediment were very stagnant, so little could live on the bottom."

Professor Aldridge and his team hope the new fossils will help piece together the puzzle of fish evolution.

"These exciting fossils will help fill in the 'missing link' in the evolutionary history of very early fishes," Professor Aldridge said.

Each new fossil find helps to paint a more complete picture, and indicate when various new adaptations evolved.

Oldest fossil

"The fossil record confirms that the evolution of fish was a step-wise event," explained Professor Aldridge. "The various characters that make up a fish, or a vertebrate, didn't all appear at once - they were added one-by-one through evolutionary time.

"These [new] fossils help fill in this pattern of how early vertebrate evolution began."

Nelson and his counterparts are not the oldest fossil fish ever to be found. The fossil of a fish which lived about 530 million years ago in China was found in the late '90s.

But these 450 million-year-old specimens are particularly interesting, Professor Aldridge believes, because they counter the idea that early fish developed mainly in the north.

"These fossils are important because there is a theory that the origins of fish really took place in the northern continents, and then spread south," he said. "This find [from Southern Africa] dispels that theory."

user posted image
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