This looks as though it might be interesting. I haven't had time to look at
the full story yet. Maybe it has an impact :-) on genetic studies?
/Gary
Ron Baalke wrote:
> Earth battered through history by comets
> Researchers say impacts caused global crises, mass extinctions
>
> BY ROBERT S. BOYD
> San Jose Mercury News
> August 17, 1999
>
> WASHINGTON -- Recent scientific discoveries are shedding new light on why
> great empires such as Egypt, Babylon and Rome fell apart, giving way to the
> periodic ``dark ages'' that punctuate human history.
>
> At least five times during the last 6,000 years, major environmental
> calamities undermined civilizations around the world. Some researchers say
> these disasters appear to be linked to collisions with comets or fragments
> of comets like the one that broke apart and smashed spectacularly into
> Jupiter five years ago this summer.
>
> The impacts, yielding many megatons of explosive energy, produced vast
> clouds of smoke and dust that circled the globe for years, dimming the sun,
> driving down temperatures and sowing hunger, disease and death.
>
> Full story here:
>
> http://www7.mercurycenter.com:80/premium/nation/docs/disaster17.htm
>
> You are subscribed to the Jet Propulsion Laboratory's stardust listserv.
> To unsubscribe, e-mail jplnews@jpl.nasa.gov . Leave the subject field
> blank, and type unsubscribe stardust in the body of the message.
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Date: Wed, 18 Aug 1999 08:34:41 -0700 (PDT)
From: baalke@pdcsun.jpl.nasa.gov (Ron Baalke)
Subject: Earth Battered Through History By Comets
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Earth battered through history by comets
Researchers say impacts caused global crises, mass extinctions
BY ROBERT S. BOYD
San Jose Mercury News
August 17, 1999
WASHINGTON -- Recent scientific discoveries are shedding new light on why
great empires such as Egypt, Babylon and Rome fell apart, giving way to the
periodic ``dark ages'' that punctuate human history.
At least five times during the last 6,000 years, major environmental
calamities undermined civilizations around the world. Some researchers say
these disasters appear to be linked to collisions with comets or fragments
of comets like the one that broke apart and smashed spectacularly into
Jupiter five years ago this summer.
The impacts, yielding many megatons of explosive energy, produced vast
clouds of smoke and dust that circled the globe for years, dimming the sun,
driving down temperatures and sowing hunger, disease and death.
Full story here:
http://www7.mercurycenter.com:80/premium/nation/docs/disaster17.htm
You are subscribed to the Jet Propulsion Laboratory's stardust listserv.
To unsubscribe, e-mail jplnews@jpl.nasa.gov . Leave the subject field
blank, and type unsubscribe stardust in the body of the message.
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