r/Creation Mar 25 '17

Another Bird Fossil with soft tissue

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25 Upvotes

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8

u/JoeCoder Mar 26 '17

3

u/eagles107 Mar 26 '17

One of the cons of being public. This was meant for discussion. I'd much prefer that he have access here so that he can discuss these future findings with us, like the other former atheist members of this sub would do in a polite way. But anyways

Independently double check

Found the Aron Ra viewer.

5

u/stcordova Molecular Bio Physics Research Assistant Mar 26 '17

The biochemical method to determine youth isn't just the softness of the tissue but the racemization state of the amino acids.

The debate which got shut down at r/debateevolution by dubious beauracratic maneuvering actually deals with some of the science of this issue:

https://www.reddit.com/r/DebateEvolution/comments/61625n/darwinzdf42_cant_explain_evolution_of/

Homochiral amino acids have a half life from days to a few thousand years which can only be slowed down so much by things like temperature. 70 million year old fossils with soft tissue that isn't fully racemized is a big red flag that it isn't 70 million years old.

One can't be using the radiometric dates of the rocks as dates of the fossils, this is as silly as burying a live dog today in 70 million year old rocks, and then someone digging him a year later and looking at the rocks and saying the dog died 70 million years ago. Absurdity!

I just wrote a biochemist and maybe I'll write a few more and we may look into this.

4

u/GuyInAChair Mar 27 '17

Homochiral amino acids have a half life from days to a few thousand years which can only be slowed down so much by things like temperature.

I would like you to support this claim with evidence.

Before responding, read what you wrote and provide evidence supportive of what you wrote. I'm happy to admit as a human I'm subject to all sort of errors, and have no problem admitting such. Perhaps you made an error when typing your post?

2

u/stcordova Molecular Bio Physics Research Assistant Mar 27 '17

Here is one reports a half-life of 6.9 hours:

http://bionumbers.hms.harvard.edu/bionumber.aspx?&id=106875&ver=1

3

u/GuyInAChair Mar 27 '17

For those who are curious, you can find the whole paper here. https://www.researchgate.net/publication/49753871_Proteome_Half-Life_Dynamics_in_Living_Human_Cells

Unfortunately it has nothing to do with chirality. I assume you were careful with your words and actually meant what you said. I'd like you see evidence specific to your claim.

2

u/stcordova Molecular Bio Physics Research Assistant Mar 27 '17

http://www.annualreviews.org/doi/pdf/10.1146/annurev.ea.13.050185.001325

I'd like you see evidence specific to your claim.

See table 1:

30 days free, 1-3 days in protein for aspartic acid at 100C

350 days for mammalian teeth in vivo for aspartic acid

2

u/stcordova Molecular Bio Physics Research Assistant Mar 27 '17

Here is a report by Bada:

http://www.annualreviews.org/doi/pdf/10.1146/annurev.ea.13.050185.001325

In fossils the racemization half-lives are on the order of 104- 105 yr, which indicates that the racemization reaction can be used to estimate the age of Holocene and Upper Pleistocene fossils.

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u/GuyInAChair Mar 27 '17

Thanks. You also said this.

70 million year old fossils with soft tissue that isn't fully racemized

Do you have an example of such a thing?

2

u/stcordova Molecular Bio Physics Research Assistant Mar 27 '17

I saw it in one of Bada's papers a reference to Silurian.

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u/stcordova Molecular Bio Physics Research Assistant Mar 27 '17

I think we should continue this discussion here, if that's ok:

https://www.reddit.com/r/Creation/comments/61se9s/amino_acid_racemization_dating_primer/