Half-Billion-Year-Old "Last Supper"

[FreeinChrist]

ADVISOR HAT


This thread is closed for review. There is off topic trolling starting on page one, and very little discussion of the topic in the OP. Doing a clean up would remove most of the thread.


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[FreeinChrist]

ADVISOR HAT

A large clean up was done in this thread. There was a real problem with off topic posts, and flaming and some trolling in this thread.

AS A REMINDER, the Statement of Purpose or this forum includes:
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Physical Sciences address the nature and properties of non-living systems while life sciences address the nature and properties of living matter. This may include the way two or more of these have an effect on each other between observation, theory, deduction and application.​

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Let me repeat the last one 'louder':

Creation and Evolution discussions are off topic to this main forum, and should be started in the sub-forum, Creation & Evolution.

I am reopening this but stay on topic and do not flame other views or make derogatory comments about the faith of other Christians. Continuing to post off topic will lead to a thread ban or a forum specific ban and warnings that lead to a ban.


I will be monitoring the threads in this forum closely - again. ​

 

[Warden_of_the_Storm]

"About 465 million years ago, an armored critter resembling a sea roach died near what is now Prague. The final meal of this animal—a trilobite—still sat in its guts as sediment buried its body in the sea floor of an ancient Paleozoic sea. There, it remained entombed for ages. Now, scientific sleuths have deduced the contents of this meal, providing the first direct evidence of the diet and lifestyle of this primal and iconic group of arthropods."

https://www.science.org/content/article/scientists-reveal-half-billion-year-old-last-supper

I didn't actually click the link to see the picture of the specimen, but this is so cool.

And there's the this little tidbit too:

Although the guts themselves were not preserved in the fossil, their contents reveal important information about the physiology of the trilobite. The shells from its final meal are made of calcium carbonate, which dissolves in acidic conditions, so the researchers think the animal’s gut had a neutral or alkaline pH. And because the shells left an imprint of the shape of the digestive tract, the researchers could tell the animal had two stomachs.

My knowledge of biology is not the best, but I would love to know how a creature could have a neutral or alkaline pH for stomach acid because that sounds so cool.

 

[sjastro]

The most common fossils are not surprisingly of marine organisms including.

• trilobites;
• bivalves;
• ammonites;
• belemnites;
• brachiopods;
• corals;
• crinoids.

Marine conditions are ideal for fossilization; a rapid burial in sediment and if undisturbed for a sufficient period, fossilization through permineralization.

Such fossils cannot be dated directly and requires very specific conditions such as volcanism where the fossils are sandwiched between igneous layers.

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The igneous layers can be dated using the following methods and the fossil age is expressed as an age range of the top and bottom igneous layers.

 

[Occams Barber]

My knowledge of biology is not the best, but I would love to know how a creature could have a neutral or alkaline pH for stomach acid because that sounds so cool.

You might be interested in this paper. It talks about the (secondary) function of stomach Ph as a barrier against pathogens. Neutral or slightly alkaline gut Ph is more likely in an animal which is distantly related (in the evolutionary sense) to its food (e.g. herbivores) since it is less likely to pick up dangerous pathogens from its food.

Slightly acidic gut environments may have evolved to filter out pathogens dangerous to animals which eat meat since meat will support pathogens which are dangerous to meat eaters.

I'm seriously (and badly) over simplifying here.

The Evolution of Stomach Acidity and Its Relevance to the Human Microbiome

Gastric acidity is likely a key factor shaping the diversity and composition of microbial communities found in the vertebrate gut. We conducted a systematic review to test the hypothesis that a key role of the vertebrate stomach is to maintain the gut microbial community by filtering out novel...

journals.plos.org

OB

 

[Warden_of_the_Storm]

You might be interested in this paper. It talks about the (secondary) function of stomach Ph as a barrier against pathogens. Neutral or slightly alkaline gut Ph is more likely in an animal which is distantly related (in the evolutionary sense) to its food (e.g. herbivores) since it is less likely to pick up dangerous pathogens from its food.

Slightly acidic gut environments may have evolved to filter out pathogens dangerous to animals which eat meat since meat will support pathogens which are dangerous to meat eaters.

I'm seriously (and badly) over simplifying here.

The Evolution of Stomach Acidity and Its Relevance to the Human Microbiome

Gastric acidity is likely a key factor shaping the diversity and composition of microbial communities found in the vertebrate gut. We conducted a systematic review to test the hypothesis that a key role of the vertebrate stomach is to maintain the gut microbial community by filtering out novel...

journals.plos.org

OB

I'm on my lunch break at work so I can look at it now but I will when I get home.

 

[AV1611VET]

I'm on my lunch break at work so I can look at it now but I will when I get home.

Warden, off the record, would you explain this to me please?

JOKE

 

[USincognito]

I remember riding a freight train in the west Texas desert in the summer of 1986. I stared up at the sky and I saw so many beautiful stars. I have always remembered that. In the morning while the train was still moving toward El Paso I saw many herds of free roaming horses. I watched them and thought it was very special that I got to see them. Far away from any city you see stars like you can't see anywhere else without a telescope.

I hope replying to this isn't considered too far off topic. I live in Dallas and the skies are terribly light polluted here. I can see the moon, the planets and some of the brighter stars. Some nights with a new moon and particular atmospheric conditions, even a clar sky can seem empty. I've been wanting to see the Milky Way again so I planned a weekend trip to Wichita Falls to revisit old stomping grounds with a side trip 1 1/2 hours away to a Bortle 2 location. Driving to my viewing site, I could easily see the entirety of Scorpio through the drivers window. I made a pit stop along the way and could tell the sky was full of stars and the Milky Way easily visible. At the viewing site I was amazed. The more my eyes adjusted, the more stars filled the night. Hope I can go out there again some time.

 

[Warden_of_the_Storm]

Warden, off the record, would you explain this to me please?

JOKE

No.