Skip to comments.New clues to 2bn-year-old murder
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
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."
It's not like it was an SUV hitting the earth.
An "Act of God"?
How asinine is THAT?
Apparently, they didn't notice this little number in Arizona:
It's Bush's fault.
What a terrible waste of meat.
But then again...it eventually gave me the gasoline I need to drive to the porkchop store...
Yeh, but that one's a piker comparatively.
OK, I'm confused: 2bn year old murder, 250m years ago. Which is it?
The author is blaming G-d.
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%.
For the same reason they used the past tense "called Pangea" when there were no people around to call it anything.
Earth to The Guardian: Murder is the intentional killing of a human being.
Abortion is murder. Death by meteorite strike is not.
no it wasnt, but what has he done since to prevent Rummy from doing it again?
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?
that's a small crater compared to the talked about in the article.
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.
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