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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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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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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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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Michael Braukus
Headquarters, Washington
202-358-1979
[email protected]
Aug. 2, 2010
MEDIA ADVISORY : M10-105
NASA Hosts Workshop To Discuss Exploring Near Earth Objects
WASHINGTON — NASA will host an interactive workshop to identify objectives for exploration missions to near-Earth objects, or NEOs, on Aug. 10-11 at the Renaissance Mayflower Hotel in Washington.
The event will…
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See session proceedings here.
Session 5: Comet Impact as the Cause of the Younger Dryas: Pros and Cons
Chair: Dan Muhs
Allen West
1:00 p.m. Allen West – The Younger Dryas impact controversy: Exploring the competing hypotheses for the deposition of nanodiamonds, magnet c spherules, and other
evidence at 12.9 ka
Todd Surovell
1:30 p.m. Todd Surovell – Magnetic grains and microspherules from…
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Moon to Earth: New LRO Lunar Crater Analysis has potential to revise impact frequency for Terrafirma
By comparing the LRO pictures with images collected by Apollo missions in the 1970s, they have found five craters that have appeared in the past four decades. That is helping the team to determine how frequently objects strike the Moon, says planetary geologist Alfred McEwen of the University of Arizona in Tucson. They have only surveyed a small sliver of the Moon, and expect to find more craters…
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