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Space rock: piece of early life puzzle?

meteorites fossil meteorites life ordovician period

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9 replies to this topic

#1    Waspie_Dwarf

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Posted 01 July 2014 - 08:01 PM

Swedish space rock may be piece of early life puzzle


New Scientist said:

A fossil meteorite unlike anything seen before has been uncovered in a Swedish quarry. The mysterious rock may be the first known piece of the "bullet" that sparked an explosion of life on early Earth.

Roughly 100 fossil meteorites have emerged from the limestone quarry west of Stockholm, which is being mined for flooring. All of the meteorites are part of an iron-poor class called the L chondrites. They date back about 470 million years to the Ordovician period, when Earth experienced a mysterious burst of new species.

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"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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#2    paperdyer

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Posted 03 July 2014 - 07:42 PM

So after reading the article, I get the impression that all life on Earth didn't come crawling out of the ocean.  Anyone else read the article that way?


#3    CuriousRey

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Posted 03 July 2014 - 09:24 PM

The impression I get from the article is that they really haven't even completely identified whether or not this is the "bullet" asteroid in question. Even if it is they are still in the dark as to whether or not this had any influence on the biodiversification of life on the planet, it seems to just be speculatory at this point though the discovery itself is interesting.


#4    Waspie_Dwarf

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Posted 03 July 2014 - 09:27 PM

View Postpaperdyer, on 03 July 2014 - 07:42 PM, said:

Anyone else read the article that way?
Not at all.

The article makes no mention at all of how life started on Earth, it points out that an explosion in life forms came 490 million years ago at time of increased meteorite impacts but makes it clear that life was already here at the time:

Quote

About 515 million years ago, our planet was going through an evolutionary slump. A burst of diversity that happened during the Cambrian period had tapered off, and few new types of animals were emerging. Mysteriously, about 25 million years later life sprang back into action in the early part of the Ordovician, generating loads of species.


"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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#5    Ashyne

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Posted 04 July 2014 - 01:41 AM

Bullet fired by an alien gun.


#6    shrooma

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Posted 04 July 2014 - 09:46 PM

QUOTE-
It’s not clear exactly why the
Ordovician meteor shower led to a
greater variety of life on the planet.
.
funny., i was thinking the same thing...

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#7    TheGreatBeliever

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Posted 10 July 2014 - 01:48 PM

I knew it!  If its true  it proves there might be beings like us on other planets

Edited by TheGreatBeliever, 10 July 2014 - 01:59 PM.


#8    Waspie_Dwarf

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Posted 10 July 2014 - 02:56 PM

View PostTheGreatBeliever, on 10 July 2014 - 01:48 PM, said:

I knew it!  If its true  it proves there might be beings like us on other planets

How does it exactly?

I'll answer that for you... it doesn't prove any such thing.

All it suggests is that there may be a link between large meteorite impacts and rapid evolution of life on Earth. There is no suggestion, implicit or implied, of extraterrestrial life in this study.

Even if there were evidence of extraterrestrial life being brought to Earth in meteorites (the Panspermia hypothesis) this would suggest that microbial life is common in the galaxy but would still offer not the slightest scrap of evidence that, "beings like us," exist on any other planet.

Edited by Waspie_Dwarf, 10 July 2014 - 02:57 PM.

"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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#9    magikgoddess

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Posted 12 July 2014 - 01:44 AM

The impression I get from this article is that the meteorite impacts seemed to help add more different kinds of life by possible seeding... just space trying to balance out the boring fish life we had going on back then, lol...


#10    taniwha

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Posted 13 July 2014 - 09:13 AM

Yes unless they have got it wrong,  it seems a meteorite ploughed into pre historic earth 470 million years ago followed seconds later by a burst of life.  Incredible! :clap:





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