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New clues to 2bn-year-old murder
The Guardian ^ | Friday May 14, 2004 | Tim Radford

Posted on 05/14/2004 8:45:55 AM PDT by ckilmer

New clues to 2bn-year-old murder

Tim Radford, science editor Friday May 14, 2004

The Guardian

Scientists believe they are on the track of the biggest mass murderer in the two-billion year history of life. A buried crater off Australia could be the first direct evidence of a celestial assassin that wiped out more than 80% of life on Earth 250m years ago. Luann Becker, of the University of California, Santa Barbara, reports in Science online today on extensive evidence for a 125-mile wide crater called Bedout off the northwestern coast of Australia. The clues match the date of an event known to palaeontologists as the "great dying" - the spectacular mass extinction at the end of the Permian era, when 80% of all terrestrial creatures, and 95% of all marine life, were wiped out.

For decades researchers have argued about whether the damage was done by volcanism, climate change, glaciation, or a comet or asteroid. For the first time, there is evidence of a direct hit from a cosmic projectile.

While working in Antarctica, Dr Becker and colleagues found meteor fragments in sediment formed at the end of the Permian. But they also found something even more telling: fragments of "shocked quartz" - evidence of violently altered terrestrial rock - in Antarctica and Australia in the same stratum. At the time, Australia, Antarctica, Africa and the Americas were part of a huge supercontinent called Pangea.

The Bedout cores also looked similar to cores taken from Chicxulub, in the Yucatán peninsula, Mexico, the site linked to the end of the Cretaceous period 65m years ago when the dinosaur family was wiped out.

"We think mass extinctions may be defined by catastrophes like impact and volcanism occurring synchronously in time," Dr Becker said.

"This is what happened 65m years ago at Chicxulub but was largely dismissed by scientists as merely a coincidence. With the discovery of Bedout, I don't think we can call such catastrophes occurring together a coincidence any more."


TOPICS: Australia/New Zealand; Culture/Society; Miscellaneous
KEYWORDS: catastrophism; comet; extinction; godsgravesglyphs; palaeontology; permian
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1 posted on 05/14/2004 8:45:58 AM PDT by ckilmer
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To: ckilmer
Why do they call it "murder"?
It wasn't an intentional act, for crying out loud.
2 posted on 05/14/2004 8:50:33 AM PDT by Izzy Dunne (Hello, I'm a TAGLINE virus. Please help me spread by copying me into YOUR tag line.)
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To: Izzy Dunne
It wasn't an intentional act, for crying out loud.

It's not like it was an SUV hitting the earth.

3 posted on 05/14/2004 8:52:17 AM PDT by KarlInOhio (Teach a Democrat to fish and he will curse you for not just giving him the fish.)
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To: Izzy Dunne

An "Act of God"?


4 posted on 05/14/2004 8:53:04 AM PDT by null and void (Hello, I'm a TAGLINE virus. Please help me spread by copying me into YOUR tag line.)
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To: ckilmer
For the first time, there is evidence of a direct hit from a cosmic projectile.

How asinine is THAT?
Apparently, they didn't notice this little number in Arizona:

5 posted on 05/14/2004 8:53:26 AM PDT by Izzy Dunne (Hello, I'm a TAGLINE virus. Please help me spread by copying me into YOUR tag line.)
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To: ckilmer

It's Bush's fault.

Mark


6 posted on 05/14/2004 8:54:03 AM PDT by MarkL (The meek shall inherit the earth... But usually in plots 6' x 3' x 6' deep...)
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To: ckilmer

What a terrible waste of meat.

But then again...it eventually gave me the gasoline I need to drive to the porkchop store...


7 posted on 05/14/2004 9:13:49 AM PDT by PoorMuttly ("Give me Liberty...or give me Lunch" (with enough lunch, I'll figure out how to TAKE Liberty myself)
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To: Izzy Dunne

Yeh, but that one's a piker comparatively.


8 posted on 05/14/2004 9:17:07 AM PDT by Just another Joe (Warning: FReeping can be addictive and helpful to your mental health)
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To: ckilmer

OK, I'm confused: 2bn year old murder, 250m years ago. Which is it?


9 posted on 05/14/2004 9:18:31 AM PDT by Rocky (Kerry cannot decide what style of empty suit he should be)
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To: Rocky
"OK, I'm confused: 2bn year old murder, 250m years ago. Which is it?"

News reporting at its finest.
10 posted on 05/14/2004 9:23:13 AM PDT by Skywarner (Enjoying freedom? Thank a Veteran!)
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To: Izzy Dunne

The author is blaming G-d.


11 posted on 05/14/2004 9:24:51 AM PDT by xrp
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To: Rocky

Typical media science garbling.
If 95% of species went extinct, then 99+% of individuals must have been wiped out, i.e. 100% of 95% plus X% of 5%.


12 posted on 05/14/2004 9:25:46 AM PDT by UnbelievingScumOnTheOtherSide (Give Them Liberty Or Give Them Death! - Islam Delenda Est! - Rumble thee forth...)
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To: Izzy Dunne
Why do they call it "murder"?

For the same reason they used the past tense "called Pangea" when there were no people around to call it anything.

13 posted on 05/14/2004 9:27:30 AM PDT by ASA Vet (Our grandchildren will be forced to decide which culture will survive.)
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To: ckilmer

Earth to The Guardian: Murder is the intentional killing of a human being.

Abortion is murder. Death by meteorite strike is not.


14 posted on 05/14/2004 9:28:53 AM PDT by Cicero (Marcus Tullius)
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To: ckilmer

http://www.donaldedavis.com/BIGPUB/BIGIMPCT.jpg


15 posted on 05/14/2004 9:54:02 AM PDT by mmartins
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To: ckilmer

YEC INTREP


16 posted on 05/14/2004 10:16:31 AM PDT by LiteKeeper
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To: MarkL

no it wasnt, but what has he done since to prevent Rummy from doing it again?


17 posted on 05/14/2004 10:23:35 AM PDT by Docbarleypop (Navy Doc)
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To: ckilmer

I have said this before, now I am saying it again. Scientists DO NOT KNOW what happened, when it happened, and how it happened 250 million years ago, because they were not there. There is absolutely no way of any kind they could ever know for sure how to answer the aforementioned questions. All we know from that far back is speculation and theory at best. I agree scientists can guess, formulate theories, and maybe even get as far as forming a hypothesis, but scientists could never KNOW beyond the shadow of doubt or contradiction what really happened.

I leave all of you with this question:

Why is it we take a scientists word for it when he or she says there are literally millions upon millions of stars and galaxies, yet we have to touch the painted surface when there is a sign written in all capital letters clearly stating the paint is wet?


18 posted on 05/14/2004 10:41:13 AM PDT by ChevyZ28 (Most of us would rather be ruined by praise, than saved by criticism.)
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To: Izzy Dunne

that's a small crater compared to the talked about in the article.


19 posted on 05/14/2004 1:23:01 PM PDT by ckilmer
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To: ckilmer
that's a small crater compared to the talked about in the article.

So what?
The stupid claim was:
For the first time, there is evidence of a direct hit from a cosmic projectile.

There's been plenty of evidence around the Barringer crater for lots of years.

20 posted on 05/14/2004 1:30:42 PM PDT by Izzy Dunne (Hello, I'm a TAGLINE virus. Please help me spread by copying me into YOUR tag line.)
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