Skip to comments.Cosmic blast may have killed off megafauna Scientists say early humans doomed, too
Posted on 09/26/2007 6:11:48 AM PDT by baynut
Wooly mammoths, giant sloths, saber-toothed cats, and dozens of other species of megafauna may have become extinct when a disintegrating comet or asteroid exploded over North America with the force of millions of hydrogen bombs, according to research by an international team of scientists.
The blast, which the researchers believe occurred 12,900 years ago, may have also doomed a mysterious early human culture, known as Clovis people, while triggering a planetwide cool-down that wiped out the plant species that sustained many outsize Ice Age beasts, according to research published online yesterday in the Proceedings of the National Academy of Sciences.
(Excerpt) Read more at boston.com ...
I was just reading my homeowners policy. It excludes “asteroids.”
I thought it was a joke at first.
The universe seems to be one giant pinball machine?
You mean to tell me it wasn’t dinosaur farts?
So, are they saying this was even worse than the effects of a Hummer H2?!
The chicken little society lives....
Worldkillers (or serious world changers) like Chicsulub are rare, but smaller ones like Tunguska more frequent.
The Wisconsin impact was not as big as Chix by a long shot.
I think the frequency of Tunguska-size hits was on the order of 10,000 years, but look it up, I’m probably off. anyway, the number of craters and ash layers and so forth indicates pretty good agreement with theory. We are finding new craters and other evidence (Madagascar Chevrons, Australian tektites, Araona Crater, and the like) that show that we getting whacked on a fairly regular basis.
Burckle Crater is on the sea floor in the Indian Ocean, it’s 20-30 KM in diameter, and is only 6,000 years old.
I’m upgrading my aluminum foil deflector beanie to a WWII steel pot!
Fine. I didn’t want the Clovis moving into my neighborhood anyway.
I guess the global cool down did not affect Wrangle Island where dwarf mammoths lived until 4,000 years ago.
All seems possible though. sh1t happens.
I saw the headline and thought...
Figure 6 has a good chart.
Tunguska-size to Barringer-size ranges from every 100 to every few thousand years.
The 1 million rate is for really big rocks like Chix, Manson, and Chesapeake (and maybe the new one under the ice in the Antarctic).
A predicted rate is not a rule that asteroids and comets must follow, it’s a “fit” based on observation of crater size and estimated age.
BTW, anyone else watch the series "Mega Disasters"? Interesting stuff..
We need to install a set of near-earth flippers...
The History Channel had a show on last night about "cold".
Did you know the US has a freezer-bunker for frozen seeds?
That there is another freezer-bunker dug into the Norway frozen tundra for a World Seed Supply?
If humans are made extinct by Global Warming I don't know who would find and plant them?
"...detritus was spread from California to Belgium"Yet one more thing for the Europeans to blame on Americans.
"The blast, which the researchers believe occurred 12,900 years ago..."Say, isn't that when the Sphinx ceased being weathered by falling water and the Sahara Desert spread over Egypt and the rest of North Africa?
Maybe there's more to this Phaethon business than we thought!
The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
Did comet start deadly cold snap?
Canada.com | Monday, May 14, 2007 | Margaret Munro
Posted on 05/16/2007 6:00:33 PM EDT by Mike Darancette
Diamonds tell tale of comet that killed off the cavemen
Guardian | 5-20-07 | Robin McKie
Posted on 05/20/2007 7:50:33 PM EDT by Renfield
Catastrophic Comet Chilled and Killed Ice Age Beasts (and Clovis people)
Live Science | 05/21/07 | Jeanna Bryner
Posted on 05/22/2007 1:16:48 AM EDT by TigerLikesRooster
Oregon Researchers Involved In New Clovis-Age Impact Theory (More)
Posted on 05/23/2007 5:30:19 PM EDT by blam
Comet May Have Doomed Mammoths
Red Orbit | 5-26-07 | Betsy Mason
Posted on 05/26/2007 9:12:53 AM EDT by Renfield
Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada? (More) (Carolina Bays)
Science News | 6-1-2007 | Sid Perkins
Posted on 06/02/2007 6:14:23 PM EDT by blam
Comet Theory Collides With Clovis Research, May Explain Disappearance of Ancient People
University of South Carolina(USC News) | June 28, 2007 | Staff
Posted on 08/04/2007 2:29:34 AM EDT by ForGod’sSake
NSF Press Release:
Comet May Have Exploded Over North America 13,000 Years Ago
National Science Foundation Press Release | August 14, 2007 | Cheryl Dybas, NSF
Posted on 08/15/2007 8:32:04 PM EDT by baynut
Research Team Says Extraterrestrial Impact To Blame For Ice Age Extinctions (More)
Eureka Alert | Northern Arizona University - Lisa Nelson
Posted on 09/25/2007 3:58:19 PM EDT by blam
Cosmic blast may have killed off megafauna
Scientists say early humans doomed, too
Boston Globe | September 27, 2007 | Colin Nickerson
Posted on 09/25/2007 9:45:11 PM EDT by baynut
Evidence for an extraterrestrial impact 12,900 years ago
Proceedings of the National Academy of Sciences, October 9, 2007, Vol. 104 | Setember 27, 2007 | R. B. Firestone, et. al.
Posted on 09/30/2007 1:14:28 PM EDT by baynut
The End of Eden: The Comet That Changed Civilization
amazon | Oct. 8, 2007
Posted on 10/09/2007 2:47:23 AM EDT by doug from upland
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