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FOSSIL DIATOMS IN A NEW CARBONACEOUS METEORITE

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Description: We report the discovery for the first time of diatom frustules in a carbonaceous
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BoogieMonster
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« Reply #15 on: January 15, 2013, 22:05:28 PM »

Maybe the aliens are not here after all.

Methinks the implication is we're the aliens.
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brianvds
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« Reply #16 on: January 16, 2013, 04:31:28 AM »

How do diatoms live and reproduce in space anyway? Or are they just carried from planet to planet via meteorites?

I can't quite remember the details of the panspermia theory anymore and I'm too lazy to go look it up. Smiley
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Rigil Kent
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« Reply #17 on: January 16, 2013, 07:04:27 AM »

A diatom is very poorly adapted for life inside a comet.

On earth, diatoms are free living (not anchored) in lakes, oceans and puddles. Like other green plants, they depend on the availability of sunlight, carbon dioxide and some minerals. Living inside a comet immediately removes access to liquid water and sunlight  and I wouldn't be surprised if any possible carbon dioxide is frozen solid too.

So their presence in the rock must be accidental.

Rigil
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BoogieMonster
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« Reply #18 on: January 16, 2013, 11:32:27 AM »

Living inside a comet immediately removes access to liquid water and sunlight  and I wouldn't be surprised if any possible carbon dioxide is frozen solid too.

You wouldn't have to "live" inside the comet to get panspermia. You would freeze with the water and carbon and get re-animated upon arriving at your destination (if diatoms can do that), or maybe coming close enough to the sun for a while, etc...
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brianvds
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« Reply #19 on: January 16, 2013, 13:49:22 PM »

Living inside a comet immediately removes access to liquid water and sunlight  and I wouldn't be surprised if any possible carbon dioxide is frozen solid too.

You wouldn't have to "live" inside the comet to get panspermia. You would freeze with the water and carbon and get re-animated upon arriving at your destination (if diatoms can do that), or maybe coming close enough to the sun for a while, etc...

What I'm wondering now is how exactly the panspermia theory can be tested...

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Tweefo
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« Reply #20 on: January 16, 2013, 14:11:14 PM »

Badastronomer recon this is bad.
http://www.slate.com/blogs/bad_astronomy/2013/01/15/life_in_a_meteorite_claims_by_n_c_wickramasinghe_of_diatoms_in_a_meteorite.html
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Brian
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« Reply #21 on: January 16, 2013, 14:43:19 PM »

wonder if we'll see a "professional' response from Wickmysingsong.
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Lurkie
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« Reply #22 on: February 22, 2013, 22:00:44 PM »

Quote
Incidentally, how does one pronounce the word "diatom"? Is it "die-atom" or "dia-tom"?

My geology profs from yonks ago used to say 'die-a-tom', with a shorter pause between the last two sounds.
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Tweefo
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« Reply #23 on: March 12, 2013, 08:30:36 AM »

More on the Wickramasinghe diatoms find. They brought out some more stuff, but it's the same. Use with a pinch of salt. The Bad Astronomer had this to say. http://afsky.wozaonline.co.za/Newsletter
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