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Author Topic:   Footprints walking into the past ... oldest footprints found
RAZD
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(1)
Message 1 of 7 (651994)
02-11-2012 11:57 AM


Fossil Footprints Give Land Vertebrates a Much Longer History

quote:
ScienceDaily (Jan. 7, 2010) The discovery of fossil footprints from early backboned land animals in Poland leads to the sensational conclusion that our ancestors left the water at least 18 million years earlier than previously thought.

The results of the Polish-Swedish collaboration are published online in the journal Nature.ScienceDaily (Jan. 7, 2010) The discovery of fossil footprints from early backboned land animals in Poland leads to the sensational conclusion that our ancestors left the water at least 18 million years earlier than previously thought.

For nearly eighty years, palaeontologists have been scouring the planet for fossil bones and skeletons of the earliest land vertebrates or "tetrapods" -- the ultimate progenitors of all later amphibians, reptiles, birds and mammals including ourselves. Their discoveries have suggested that the first tetrapods evolved relatively rapidly from lobe-finned fishes, through a short-lived intermediate stage represented by "elpistostegids" such as Tiktaalik, about 380 million years ago. But there is another potential source of information about the earliest tetrapods: the fossilized footprints they left behind.

In the new study a Polish-Swedish team describe a rich and securely dated footprint locality from Zachelmie Quarry in Poland that pushes back the origin of tetrapods a full 18 million years beyond the earliest skeletal evidence and forces a dramatic reassessment of the transition from water to land.

The trackways show that large tetrapods, up to three metres in length, inhabited the marine intertidal zone during the early Middle Devonian some 395 million years ago.


Could not find the Nature article.

Enjoy

(links and information forum?)


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Message 2 of 7 (652074)
02-12-2012 8:36 AM


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Thread moved here from the Proposed New Topics forum.
    
bluegenes
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(1)
Message 3 of 7 (652076)
02-12-2012 9:21 AM
Reply to: Message 1 by RAZD
02-11-2012 11:57 AM


Nature video
I remember this. Nature made a video featuring one of the paper's authors, Per Ahlberg, explaining the find. He'd make a natural T.V. presenter, I thought, in the David Attenborough "enthusiast" mold.

Nature video of site and explanation

Here's the abstract


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Coragyps
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Message 4 of 7 (652077)
02-12-2012 9:28 AM
Reply to: Message 3 by bluegenes
02-12-2012 9:21 AM


Re: Nature video
Ahlberg was a frequent participant at the old Internet Infidels discussion board several years ago. A great "explainer" of the fossil record!
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 Message 3 by bluegenes, posted 02-12-2012 9:21 AM bluegenes has responded

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bluegenes
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Message 5 of 7 (652078)
02-12-2012 9:36 AM
Reply to: Message 4 by Coragyps
02-12-2012 9:28 AM


Re: Nature video
Coragyps writes:

Ahlberg was a frequent participant at the old Internet Infidels discussion board several years ago. A great "explainer" of the fossil record!

Yes. Then at Talk Rational. It was actually from his own anouncement Here that I first heard of the discovery.


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RAZD
Member
Posts: 15828
From: the other end of the sidewalk
Joined: 03-14-2004
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Message 6 of 7 (652170)
02-12-2012 5:58 PM
Reply to: Message 3 by bluegenes
02-12-2012 9:21 AM


Re: Nature video
Nature video of site and explanation

Here's the abstract

Thanks, I was worried that something was not quite right with the citation.

Enjoy.


we are limited in our ability to understand
by our ability to understand
Rebel American Zen Deist
... to learn ... to think ... to live ... to laugh ...
to share.


Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)

This message is a reply to:
 Message 3 by bluegenes, posted 02-12-2012 9:21 AM bluegenes has acknowledged this reply

  
CoolBeans
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Joined: 02-11-2013


Message 7 of 7 (693311)
03-14-2013 12:27 AM
Reply to: Message 5 by bluegenes
02-12-2012 9:36 AM


Re: Nature video
I want to get to be a member. For some reason they dont approve my account.

Edited by CoolBeans, : No reason given.


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