Tagish Lake—The Biggest News in the Universe

Posted by RayC on Monday, December 04, 2006 at 01:15 PM. Read 1683 times. Tags:
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Well, maybe not the universe, but at least our Solar System. In case you missed it, the December 1 issue of Science has a material analysis of a meteorite that struck Tagish Lake in northern British Columbia in January 2000. What’s cool is that the meteor detonated in the atmosphere over Canada and the fragments hit the lake and immediately froze, keeping them pretty near pristine. When scientists started analyzing them, they found carbonaceous chondrite, or carbon-bearing compounds for us laymen. When the Johnson Space Center installed new electron microscopes in 2005, they found something even cooler—sub-micron bubbles less than 1/10,000th of an inch across. But wait. According to the report, the organic globules in the Tagish Lake meteorites were found to have very unusual hydrogen and nitrogen isotopic compositions. In laymen language again, it proves that the globules did not come from Earth.

“The isotopic ratios in these globules show that they formed at temperatures of about -260° C, near absolute zero,” said Scott Messenger, NASA space scientist and co-author of the paper. “The organic globules most likely originated in the cold molecular cloud that gave birth to our Solar System, or at the outermost reaches of the early Solar System.”

Am I the only one freaking about this? Organic. material. older. than. the. sun. Seeds, essentially, that have been moving through space since before our Sun flared into life. Since before an Earth. The building blocks of life. From somewhere other than Earth.  You heard it here first, folks.

[Ed’s Note: Here’s a link about the Tagish Lake meteorite at Astrobiology Magazine.com.]

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LuckyJohn19 Australia Posted on 12/04/2006 at 05:33 PM

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Yeah, pretty exciting ... this why I like this show - I had to reappraise myself with William Thomson‘s theory on temperature and absolute zero.

Pardon me whilst I morph into a fundie.
So they found some cold stuff that’s 6000 years old - what’s the big deal?  wink

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decrepitoldfool United States Posted on 12/04/2006 at 06:39 PM

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Good fundie imitation wink
6,000 years?  A tad-bit older than that

Ulfrekr United States Posted on 12/04/2006 at 07:37 PM

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I can’t wait for when they finally thaw out the meteorite- and complex life immediately evolves out of it.

Mick Australia Posted on 12/04/2006 at 08:57 PM

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I can’t wait for when they finally thaw out the meteorite- and complex life immediately evolves out of it.

And kills everyone present.

Yeah, I’ve seen The Thing.

Brock United States Posted on 12/04/2006 at 10:14 PM

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This is why I believe there is, or has been, life on planets in other solar systems. There may be precious little intelligent life out there but planets with little Rose Wises and Dons are probably as common as hydrogen molecules.

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Paul United States Posted on 12/04/2006 at 11:27 PM

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This is why I believe there is, or has been, life on planets in other solar systems.

I read sometime back that Human DNA is so remarkably different than all other DNA on Earth, That it is very likely we were brought here to this planet a very long time ago by someone. I wish they would swing back by, and pick me up.

elwedriddsche United States Posted on 12/04/2006 at 11:44 PM

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As far as I know, human DNA is remarkably similar to all the other. For fun and giggles, try to trace back the evolutionary origin of the proverbial six-pack.

Also as far as I know, our whole solar system is recycled stars. In that sense, we were brought here…

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Weapon of Mass Disturbance United States Posted on 12/05/2006 at 03:18 AM

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Even if life were found on another planet, the slovenly followers would find a way to rationalize that it was simply all part of God’s great plan.

Hank Fox United States Posted on 12/05/2006 at 08:39 AM

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I continue to think that life is an almost-inevitable property of matter. Given the right conditions of temperature, light, etc., life happens, and then evolves.

Eventually, religious fundamentalists develop, and the process switches into reverse, eventually arriving at cold lifeless materials again.

Science Goddess United States Posted on 12/05/2006 at 09:09 AM

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UM.... I have the Science article on my kitchen table.  Noplace in the article do the authors postulate that the organic molecules are the result of life.  We already know that organic molecules can be made by inorganic processes (see the “Urey Experiment” at Wikipedia.  In fact, the authors speculate that the organic materials found in the meteorite are the result of chemical reactions at low temperatures (10 to 50 K) and the result of cosmic ray ionization. 

What the article DOES suggest, is that the materials for life could have originated elsewhere in the universe, not just here on Earth.

And, no, Paul, human DNA is chemically the same as every other DNA.  Don’t you remember the genetic analyses that showed virtual identity between human DNA and that of chimpanzees?

SG

RayC United States Posted on 12/05/2006 at 09:34 AM

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To be honest, this was buried deep in my Sunday paper with a couple paragraphs, but the writeup included the words “amino acids,” which REALLY got my attention (and which also never appeared in any of the original articles). My other thought was why this didn’t get more coverage.

decrepitoldfool United States Posted on 12/05/2006 at 09:37 AM

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Ahh, “Journalism”.  rolleyes

Paul United States Posted on 12/05/2006 at 11:19 AM

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SG

And, no, Paul, human DNA is chemically the same as every other DNA.  Don’t you remember the genetic analyses that showed virtual identity between human DNA and that of chimpanzees?

I just read through several articles in an attempt to support my earlier post about DNA. It was probably information I found in a readers digest, or some other non-scientific crappy little book. However I did just read that Humans and Chimps only differ in DNA by 1%. And that I am not alone in thinking that Humans were brought here. It is really not that important to me, I usually do not devote much time to thinking about these types of issues, I think about women a lot, and where I can get a good Rueben sandwich.

Spirula United States Posted on 12/05/2006 at 11:44 AM

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What the article DOES suggest, is that the materials for life could have originated elsewhere in the universe, not just here on Earth.

This is the great thing about it though.  The critics of the Urey-Miller experiment argue that the conditions for the formation of amino acids were presupposed based on what was believed to be necessary conditions for their spontaneous formation (reducing atmosphere etc.).  This shows that there is more than one pathway to their formation, and one that no one presupposed.

moses United States Posted on 12/05/2006 at 03:06 PM

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If you have ever watched any episodes of Star Trek TNG you would know that all the bipedal races in this part of the galaxy were seeded from an ancient race that occupied this space many many years ago. That’s why we all have a common ancestor.

I also like the idea of different groups of storks with different agenda’s for different areas. I Think it explains a lot.

They would also make a handy scapegoat for a lot of things.

Your Philosophising Scribe
Allan W Janssen

moses United States Posted on 12/05/2006 at 03:09 PM

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And remember it was Joannie Mitchell who said “We are stardust!”

Michael Peacock United States Posted on 12/05/2006 at 06:21 PM

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Moses: And remember it was Joannie Mitchell who said “We are stardust!”

Cool Moses - I always thought it was CSN, and I didn’t know Joanie Mitchell wrote that, I also thought that Carl Sagan just quoted them wrong by saying “We are star stuff” in his Cosmos series.

In the context of the original post - sounds like stardust is cosmic spooge to me.

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Sadie Jane United States Posted on 12/05/2006 at 06:35 PM

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Moses: And remember it was Joannie Mitchell who said “We are stardust!”

Ah, yes. And we’ve got to get ourselves back to the garden.

Good times. smile

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moses United States Posted on 12/05/2006 at 07:33 PM

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Here we have Sadie, a love child of the sixties, waxing nostalgic about Woodstock.
Who says evolution doesn’t work!

cubiclegrrl United States Posted on 12/05/2006 at 07:43 PM

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If you have ever watched any episodes of Star Trek TNG you would know that all the bipedal races in this part of the galaxy were seeded from an ancient race that occupied this space many many years ago. That’s why we all have a common ancestor.

And I have a copy of “Hamlet” in the original Klingon.  If that isn’t further proof, I don’t know what is… wink

LuckyJohn19 Australia Posted on 12/05/2006 at 08:00 PM

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Paul: I read sometime back that Human DNA is so remarkably different than all other DNA on Earth

I read somewhere that all life (fauna AND flora - past and present) on earth could be made using part of the human DNA which I suppose means that we’re at the top of the tree ... even though we often don’t act it.  wink
This doesn’t necessarily support my statement above but it’s an interesting and enlightening article.  smile

Here we have Sadie, a love child

77 Sunset Strip wink

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I’ve discovered that it all boils down to brain wiring: your brain is wired to worship magic or it isn’t, either it’s wired to utilize logic or it isn’t, either it’s analytical of myths or it isn’t.

Bahamat United Kingdom Posted on 12/05/2006 at 08:18 PM

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i am curious as to how dna came about in the first place, given a mix of starting materials a dna strand is a essentially a template for it’s own copying, a self replicating molecule. there would have needed to have been self replicating molecules before self replicating life could exist, otherwise it would have no way of copying itself and couldn’t procreate. self replicating molecules are elaborate enough that i find it difficult to believe that any strand formed by fluke, let alone something that actually meant something useful to life, but there is no other explanation. how life actually took up dna would be interesting, since to actually use it to make proteins you need trna as a kind of decoder and the chances of an initially random dna strand actually coding for something useful, combined with the chances of new forming life that just took in the dna actually having a decoder seems very remote. i also wonder at what point do you can call a bag of self sustaining chemical reactions a living cell, and how did consciousness come about?

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Sadie Jane United States Posted on 12/05/2006 at 08:40 PM

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Unfortunately Woodstock was eight years before I was born, but I’ve watched all the footage and listened to all the music. What wouldn’t I give to have been there!

LJ19: 77 Sunset Strip

LOL

Distant Claws, you may find this helpful.

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moses United States Posted on 12/05/2006 at 08:44 PM

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Sadie I don’t remember too much of the concert, (saturday afternoon to sunday morning) but I sure do remember it was awfull wet and muddy. Never been so dirty in my life and didn’t give a shit. It took me a week to get the mud out of the car from the trip home to Toronto.

Sadie Jane United States Posted on 12/05/2006 at 09:05 PM

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You were actually there, Moses? You have my envy! Granted, you would have only been eleven, but at least you can tell people that you attended Woodstock! surprised

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