The Cosmic Tusk

September 2, 2010

Program Note

Regular readers have surely noticed the annoying and unsightly formatting problems here at the Tusk. In particular, blogs which use “block quotes” of outside material are superimposing themselves on older blogs, rendering them both nearly unreadable. While surely embarrassing for me, please rest easy. Technical personnel have been alerted and we will have it repaired soon. This is…

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Random Tusks

September 1, 2010

Tusk Exclusive: Bunch makes brief comments on Daulton paper

Ted Bunch From an email from Bunch to Leroy Ellenberger: Dear Leroy – not to worry, Dalton is a competent scientist and did what he could do with the materials given to him. The problem lies with Scott and Pinter. Some brief reasons why the Dalton et al paper is inept: 1.They did not collect from the YDB layer at the Arlington site that was used in the two Kennett et al papers, but from layers…

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August 31, 2010

Journal of Glaciology: Discovery of nanodiamond rich layer in the Greenland ice sheet

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August 31, 2010

PNAS: No evidence of nanodiamonds in Younger Dryas sediments to support an impact event

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August 27, 2010

Ellenberger to NASA's Morrison: Gauntlet Thrown

Leroy Ellenberger Dave, As you probably know, the Sep/Oct Skeptical Inquirer (whose cover features Martin Gardner) contains letters by Clark Chapman and Paul Hilfinger, reacting to your May/Jun article on the claimed impact at the Younger Dryas boundary (also with a letter from Mark Bosslough commenting on his sidebar about scientists changing their minds, citing the recent example of Wallace…

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August 26, 2010

SENATOR NELSON ON BOARD FOR DEALING WITH POSSIBLE 2022 IMPACT HAZARD

Senator Bill Nelson (D-Florida) Sec.201 (b) UNITED STATES HUMAN SPACE FLIGHT CAPABILITIES.—Congress reaffirms the policy stated in section 501(a) of the National Aeronautics and Space Administration Authorization Act of 2005 (42 U.S.C. 16761(a)), that the United States shall maintain an uninterrupted capability for human space flight and operations in low-Earth orbit, and beyond, as an essential…

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August 26, 2010

New Paper: Greenland Ice sheet shows diamond rich layer at Younger Dryas Boundary

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August 23, 2010

Again, again, again and again: Jupiter hit far more often than NASA models predict

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August 10, 2010

Breaking: PNAS paper finds no diamonds; Claims YD team mistaken in identification

Impact Hypothesis Loses Its Sparkle: Shock-Synthesized Diamonds Said to Prove Catastrophic Impact Killed Off N. American Megafauna Can’t Be Found enlarge Tyrone Daulton is pictured with the transmission electron microscrope he used to search in vain for shock-synthesized nanodiamonds, evidence that a extraterrestrial object such as a meteorite killed off North American megafauna. (Credit…

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August 10, 2010

Clayton's Craters and other cool stuff in the Sahara

I haven’t blogged in a few days while investigating the odd features of the Egyptian-Libyan Sahara. I first started poking around this subject following the announcement of the fresh and appetizing Kamil Crater in the central-western Egyptian Sahara. This got me to looking into the subject of other purported craters in the Sahara. I had no idea that a controversy has brewed for…

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Latest Posts

The archives

Program Note

Tusk Exclusive: Bunch makes brief comments on Daulton paper

Journal of Glaciology: Discovery of nanodiamond rich layer in the Greenland ice sheet

PNAS: No evidence of nanodiamonds in Younger Dryas sediments to support an impact event

Ellenberger to NASA's Morrison: Gauntlet Thrown

SENATOR NELSON ON BOARD FOR DEALING WITH POSSIBLE 2022 IMPACT HAZARD

New Paper: Greenland Ice sheet shows diamond rich layer at Younger Dryas Boundary

Again, again, again and again: Jupiter hit far more often than NASA models predict

Breaking: PNAS paper finds no diamonds; Claims YD team mistaken in identification

Clayton's Craters and other cool stuff in the Sahara

Archive

Don’t miss

Marc Young to Holden Thorp: Retract Sun et al.

Journal of Academic Ethics: Data vs. Derision: The Ethics of Language in Scientific Publication. The Younger Dryas Impact Hypothesis as a Case Study