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← Where We Split from Sharks: Common Ancestor Comes Into Focus

Where We Split from Sharks: Common Ancestor Comes Into Focus - Comments

AnAtheistBastard's Avatar Comment 1 by AnAtheistBastard

I prefer yahoo's article's title on this: "Distant Human Ancestor Had Shark Head", sigh.

Thu, 14 Jun 2012 00:05:03 UTC | #947278

Dakota2's Avatar Comment 2 by Dakota2

Oh, of course it's our ancestor. I'm convinced! Now, where in the world did all those fossils between sharks and humans go?? Fascinating stuff...

Thu, 14 Jun 2012 01:33:58 UTC | #947308

susanlatimer's Avatar Comment 3 by susanlatimer

Hello Dakota 2.

I'm not exactly sure what you're trying to say as you're being a little vague.

I would like to ask though, did you read the article or just the headline?

Thu, 14 Jun 2012 03:35:17 UTC | #947323

Ignorant Amos's Avatar Comment 4 by Ignorant Amos

Comment 2 by Dakota2

Oh, of course it's our ancestor. I'm convinced! Now, where in the world did all those fossils between sharks and humans go?? Fascinating stuff...

Oh how the ignorance stings!

Do some research....ya never know, ya might even learn something...ya could start HERE.

Thu, 14 Jun 2012 11:16:19 UTC | #947377

DavidMcC's Avatar Comment 5 by DavidMcC

Interesting. The lack of large fossil remains suggests that not only was the head shark-like, but the skeleton was, too, in that it must have been cartillaginous, not bony (otherwise, you might expect to find more substantial fossils). Also, head evolution was always going to be more reliable than scales and spines as a guide to evolution, because of what heads tell about the brain, and because the brain is less wont to sudden and dramatic evolutionary changes than scales or spines. Ironically, by similar reasoning, Acanthodes are more likely to have evolved from a lamprey-like agnathan than from a bony-headed agnathan (the ostracoderms), because lampreys also have a cartillaginous skeleton, and only have a little bit of bone-like material (the rasping tongue).

Thu, 14 Jun 2012 11:52:07 UTC | #947381

Ignorant Amos's Avatar Comment 6 by Ignorant Amos

Just in case you are genuinely interested Dakota2, there is a scalable version of the radial Tree of Life HERE....but I'm not going to be too optimistic that you'll avail yourself of this useful introduction to evolution.

Thu, 14 Jun 2012 12:04:43 UTC | #947387

Alan4discussion's Avatar Comment 7 by Alan4discussion

Comment 1 by AnAtheistBastard - I prefer yahoo's article's title on this: "Distant Human Ancestor Had Shark Head", sigh.

@ your link - All of the updated relationships will allow researchers to look more closely at how fish made the transition from jawless to jawed, Coates said.

"It helps to answer the basic question of what's primitive about a shark," he said. "And, at last, we're getting a better handle on primitive conditions for jawed vertebrates as a whole."

Details on the evolution of the jaw - good work in solidifying connections between linked species using new techniques.

@ OP link -This new revision of the lineage of early jawed vertebrates will allow paleontologists to dig into deeper mysteries, including how the body plan of these ancient species transformed over the transition from jawless to jawed fishes.

Thu, 14 Jun 2012 13:05:17 UTC | #947398

Alan4discussion's Avatar Comment 8 by Alan4discussion

Comment 2 by Dakota2

Oh, of course it's our ancestor. I'm convinced! Now, where in the world did all those fossils between sharks and humans go??

... Err - into museums and reference collections! - The scientific papers and palaeontology/biology textbooks explaining the details, went into libraries.

Chordates, fish, amphibians, reptiles, mammals, primates, and Homo species, are the main headings.

Thu, 14 Jun 2012 14:26:44 UTC | #947407

KenChimp's Avatar Comment 9 by KenChimp

Well, of course we have a common ancestor with sharks! How else are we to explain people like Mitt Romney?!

wicked grin

Sorry folks. It's the naughty monkey in me.

Thu, 14 Jun 2012 21:54:02 UTC | #947480

bluebird's Avatar Comment 10 by bluebird

distant human ancestor had shark head

Great, how many people will automatically think of that SNL skit "Candy Gram", and then not read the article :(

I was unaware of acanthodes bronni ~ cool photo of a fossil & artist rendering from UofC: link text

Fri, 15 Jun 2012 14:20:14 UTC | #947573

Dakota2's Avatar Comment 11 by Dakota2

Comment 4 by Ignorant Amos :

Do some research....ya never know, ya might even learn something...ya could start HERE.

Imaginative little circle. Artsy Fartsy. Any of it actually been proved?

Fri, 15 Jun 2012 15:23:15 UTC | #947582

Ignorant Amos's Avatar Comment 12 by Ignorant Amos

Comment 11 by Dakota2

Do some research....ya never know, ya might even learn something...ya could start HERE.

Imaginative little circle. Artsy Fartsy. Any of it actually been proved?

Only all of it!

Fri, 15 Jun 2012 15:35:16 UTC | #947585

Anvil's Avatar Comment 13 by Anvil

Comment 12 by Ignorant Amos :

Comment 11 by Dakota2

Do some research....ya never know, ya might even learn something...ya could start HERE.

Imaginative little circle. Artsy Fartsy. Any of it actually been proved?

Only all of it!

Nope, don't think so. No wonder you call yourself Ignorant!

Humans rode vegetarian sharks in the not too distant past and had them as pets. This has been proved!

They were created by a good magic man who lives on a cloud with a wand (he doesn't live with a wand, he just owns one) - this has actually been proved!

Sharks now eat man (admittedly mainly Australians) because man upsets good magic man who lives on a cloud with a wand for learning things like reading and writing.

This has all been proved and has been written down in a book that can be read which proves that good magic man who lives on a cloud with a wand understands irony.

Do you really believe that organisms can change over geological time due to natural selection? Why? Why would you do this when a far simpler - and proven - explanation is that a good magic man who lives on a cloud with a wand did it?

Think hard on this question. The good magic man will kill you and hurt you for getting it wrong.

Anvil.

Fri, 15 Jun 2012 16:36:55 UTC | #947591

Ignorant Amos's Avatar Comment 14 by Ignorant Amos

Comment 13 by Anvil

Nope, don't think so. No wonder you call yourself Ignorant!

Ah, a guess it's one of the drawbacks of reading and understanding more than one book.... confusion and ignorance sets in when one can't tell the difference between what's made up woo woo in one book and what has evidence as support in another book. }80)~

Feckin' eejit scientists and their 'Artsy Fartsy imaginative circles'.....now they've made me look like a FOOL!

Fri, 15 Jun 2012 17:23:16 UTC | #947597

Alan4discussion's Avatar Comment 15 by Alan4discussion

Comment 11 by Dakota2

Comment 4 by Ignorant Amos :

Do some research....ya never know, ya might even learn something...ya could start HERE.

Imaginative little circle. Artsy Fartsy. Any of it actually been proved?

It's a university subject known as BIOLOGY in which there are hundreds or thousands of specialist courses world wide! You might have heard of it!
It's never too late to start learning - even at basic school level! I gave you some basic details @8.

.. and by the way it is not "Artsy Fartsy." - its evidenced science, with libraries full of proof, and specialist information on the numerous life-forms - You may have heard of science & libraries too! It's where the proof has been for about the last 150 years!

Fri, 15 Jun 2012 20:00:34 UTC | #947616

Alan4discussion's Avatar Comment 16 by Alan4discussion

@OP- The analysis of the sample combined with recent CT scans of skulls from early sharks and bony fishes led the researchers to a surprising reassessment of what Acanthodes bronni tells us about the history of jawed vertebrates.

Comment 14 by Ignorant Amos - Feckin' eejit scientists and their 'Artsy Fartsy imaginative circles'.

Hi Amos!
Next they'll be saying there is an International Code of Zoological Nomenclature based on the relationships between animals on the evolutionary tree of life, which is used by all the university biologists in the world.
Then they'll be using names like Acanthodes bronni and vertebrates!
How "artsy-fartsy is that"?

The International Commission on Zoological Nomenclature (ICZN) acts as adviser and arbiter for the zoological community by generating and disseminating information on the correct use of the scientific names of animals.
.. .
The ICZN is responsible for producing the International Code of Zoological Nomenclature - a set of rules for the naming of animals and the resolution of nomenclatural problems. - http://iczn.org/

Fri, 15 Jun 2012 21:00:18 UTC | #947622

Alan4discussion's Avatar Comment 17 by Alan4discussion

Comment 11 by Dakota2

Anyway, get a copy of this book and it will give you the background details to get started with science, cosmology and biology:-

http://richarddawkins.net/articles/646193-the-magic-of-reality-paperback-release-june-21

They can be bought or borrowed from libraries.

Fri, 15 Jun 2012 22:22:13 UTC | #947626

Ignorant Amos's Avatar Comment 18 by Ignorant Amos

Comment 17 by Alan4discussion

Anyway, get a copy of this book and it will give you the background details to get started with science, cosmology and biology:-

http://richarddawkins.net/articles/646193-the-magic-of-reality-paperback-release-june-21

They can be bought or borrowed from libraries.

Alan, I think there are better odds on England winning Euro 2012 Dakota2 taking your advice.

Fri, 15 Jun 2012 22:27:56 UTC | #947628

Alan4discussion's Avatar Comment 19 by Alan4discussion

Comment 14 by Ignorant Amos

Feckin' eejit scientists and their 'Artsy Fartsy imaginative circles'.

Scientists like circles! Think of all the planets, moons, stars and orbits they have drawn, - but even before that there were "Celestial Spheres", for sky-fairies to play in!

Sat, 16 Jun 2012 10:01:28 UTC | #947680

Ignorant Amos's Avatar Comment 20 by Ignorant Amos

Comment 19 by Alan4discussion

Scientists like circles! Think of all the planets, moons, stars and orbits they have drawn, - but even before that there were "Celestial Spheres", for sky-fairies to play in!

At least the scientists understood the importance in the value of Pi....

Sat, 16 Jun 2012 10:28:17 UTC | #947684

Anvil's Avatar Comment 21 by Anvil

This is a test...

Anvil.

Tue, 19 Jun 2012 11:27:50 UTC | #947838

GreatWhiteShark's Avatar Comment 22 by GreatWhiteShark

As a great white shark my evolutionary prestige is undeniable, your welcome for the jaw. (although before someone attacks me Im well aware it evolved from a shared ancestor well before my time)

Fri, 22 Jun 2012 20:00:58 UTC | #947966