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Supernova Storm Wiped Out Mammoths?
Discovery News ^
| Sept. 28, 2005
| Jennifer Viegas
Posted on 10/17/2005 8:57:32 AM PDT by Fzob
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To: KarlInOhio
Which is more believable, all the large North American mammals were killed by a quarter milligram per square meter of material spread out over years, or the arrival of humans on the continent?
You are absolutely right, and your example requires a star 10 times bigger than our sun.
Large brained humans hunted these animals for food, as humans propagated the numbers of these large animals diminished. Another good reason these animals were hunted was to keep their numbers down for safety, they were way too big for humans to peacefully co-exist with them.
101
posted on
08/20/2006 3:09:35 PM PDT
by
lmr
(You can have my Tactical Nuclear Weapons when you pry them from my cold dead fingers.)
To: MHGinTN
You make a false assumption, that the material of the star would be evenly ejected and have no clumping.
There wouldn't be any clumping at all. Imagine a Fusion Nuclear blast 10 times the scale of our sun. The blast wave would eject the particles in an even manner and disperse them quickly. Even if there was 'clumping', that would be diminished quickly in our atmosphere unless the 'clumps' were very large to make them asteroid size which would be even more catastrophic than even what this article is suggesting.
Type la supernovae would be the most dangerous if close enough to the earth because they arise from dim (almost black) white dwarf stars. For there to be any effect on the earth they would have to happen fairly close to the earth. 25-50 light years away. At that distance, they may deplete the ozone layer, but would even need to be closer than that for higher radiation and particle bombardment on the scale that this article is suggesting.
102
posted on
08/20/2006 3:29:18 PM PDT
by
lmr
(You can have my Tactical Nuclear Weapons when you pry them from my cold dead fingers.)
To: Fzob
I hope it took out Ray Romano's irritating voice, too.
103
posted on
08/20/2006 3:30:41 PM PDT
by
freedumb2003
(I LIKE you! When I am Ruler of Earth, yours will be a quick and painless death)
To: Dr. I. C. Spots
Actually the fossil record doesn't show anything because the dating techniques that are used are unreliable. Please post peer-reviewed scientific challenges to modern dating methods.
Although they are still used as a bit rough, they are pretty accurate in terms of magnitude.
104
posted on
08/20/2006 3:35:21 PM PDT
by
freedumb2003
(I LIKE you! When I am Ruler of Earth, yours will be a quick and painless death)
To: lmr
I was thinking more of plasma 'clumping' ... thanks for the ping.
105
posted on
08/20/2006 6:02:23 PM PDT
by
MHGinTN
(If you can read this, you've had life support from someone. Promote life support for others.)
To: Fzob
106
posted on
08/20/2006 6:04:14 PM PDT
by
Dustbunny
(The BIBLE - Basic instructions before leaving earth)
107
posted on
06/10/2007 9:28:23 PM PDT
by
SunkenCiv
(Time heals all wounds, particularly when they're not yours. Profile updated June 8, 2007.)
To: 75thOVI; AFPhys; Alice in Wonderland; AndrewC; aristotleman; Avoiding_Sulla; BenLurkin; Berosus; ...
here’s a topic from a few years ago, plus this link to a closed, old-style FR topic:
The Mammoths Demise
Source: discovering archaelogy
Published: 02/27/01 Author: Editors of Discovering Archaelogy
Posted on 03/20/2001 11:59:27 PST by Ada Coddington
http://www.freerepublic.com/forum/a3ab7b69f5baa.htm
108
posted on
08/17/2007 11:00:37 PM PDT
by
SunkenCiv
(Profile updated Friday, August 17, 2007. https://secure.freerepublic.com/donate/)
109
posted on
08/17/2007 11:06:35 PM PDT
by
SunkenCiv
(Profile updated Friday, August 17, 2007. https://secure.freerepublic.com/donate/)
To: Fzob
Through time bad things seem to happen. We’ve been so luck in the last 10,000 years or so tat we are having to invent disasters.
111
posted on
07/18/2010 6:11:04 PM PDT
by
SunkenCiv
("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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