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CCNet 15/2002 - 25 January 2002
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"This point is important to the NEO community because it was precisely this impact dust that was used in estimates by Chapman and Morrison (1994) to calculate the threshold asteroid size for a global catastrophe. I argue that these calculations are no longer valid and that a new assessment of the impact hazard is needed."
-- Kevin Pope, 25 January 2002

"I have been skeptical of the 'darkness at noon' scenario for years."
-- Jay Melosh, University of Arizona

"The strong implication [of Pope's study] is that the impact explanation of the K-T extinction will fall if the dust cloud hypothesis falls."
-- David Raup, University of Chicago

"Crucially, Pope ignores the social and economic knock-on effects of such a global disaster. While we as a species would not become extinct as a result of such an impact, it is almost certain that the world as a whole would suffer to the extent of civilization collapse and Dark Age conditions."
-- Benny Peiser, Liverpool John Moores University

"The incidence of asteroids about 1 km in diameter is estimated in the order of one impact in 100 000 - 200 000 years. It follows that some 20-30 such impacts occurred since humans appeared on this planet about 4-5 million years ago - yet (to-date) the species survived.”
-- Andrew Glikson, Australian National University

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1. POPE REKINDLES DINO-KILLER CONTROVERSY . . .
Space.com 24 January 2002

• K/T EVENT AND FINE DUST PARTICLES . . .
Gerrit Verschuur

• THE PRECISE NATURE OF IMPACT-TRIGGERED ATMOSPHERIC "DUST" EFFECTS AND ASTEROID RISK FACTORS ARE VERY DIFFERENT ISSUES . . .
Andrew Glikson

• A RESPONSE BY KEVIN POPE . . .
Kevin Pope

• ENVIRONMENTAL EFFECTS OF IMPACTS . . .
Michael Paine

• NASA HASN'T OVERSTATED IMPACT HAZARD . . .
David Johnson

• NEO HUNT TO COMMENCE SOON WITH A 6-METER LIQUID TELESCOPE . . .
Daniel Fischer

...And, finally:

• ASTEROID IMPACT MAY HAVE ADDED TO AUSTRALIAN WEALTH . . .
AAP, 25 January 2002

All currently available at CCNet.

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Dan

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