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Supernova left its mark in ancient bacteria

supernovae bacteria iron-60 magnetite

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#1    Waspie_Dwarf

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Posted 16 April 2013 - 09:28 PM

Supernova left its mark in ancient bacteria
Radioactive iron may be first fossil imprint of a nearby cosmic explosion.


www.nature.com said:

Sediment in a deep-sea core may hold radioactive iron spewed by a distant supernova 2.2 million years ago and preserved in the fossilized remains of iron-loving bacteria. If confirmed, the iron traces would be the first biological signature of a specific exploding star.

Shawn Bishop, a physicist at the Technical University of Munich in Germany, reported preliminary findings on 14 April at a meeting of the American Physical Society in Denver, Colorado.

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#2    Zeta Reticulum

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Posted 17 April 2013 - 07:27 AM

So how did crocs and sharks and anything that was on land survive this ?


#3    Waspie_Dwarf

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Posted 17 April 2013 - 08:22 AM

View PostZeta Reticulum, on 17 April 2013 - 07:27 AM, said:

So how did crocs and sharks and anything that was on land survive this ?

With the greatest of ease. This wasn't an extinction event. Nothing died as a result, it just that some of the material from the supernova found its way to Earth.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#4    Zeta Reticulum

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Posted 17 April 2013 - 08:32 AM

So if Betelgeuse goes super nova, we have nothing to worry about ?


#5    Waspie_Dwarf

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Posted 17 April 2013 - 10:14 AM

View PostZeta Reticulum, on 17 April 2013 - 08:32 AM, said:

So if Betelgeuse goes super nova, we have nothing to worry about ?

Nope.

A supernova within about 30 light years of Earth could potentially wipe at most or all life here, but Betelguese is 643 ± 146 light years from Earth.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#6    Frank Merton

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Posted 17 April 2013 - 10:18 AM

It would be a show though


#7    Waspie_Dwarf

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Posted 17 April 2013 - 10:45 AM

View PostFrank Merton, on 17 April 2013 - 10:18 AM, said:

It would be a show though
Oh yes!

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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