At http://phys.org/print290254727.html ... rock samples from Tunguska appear to be meteoric in origin according to a paper in Planetary and Space Science (5th June 2013) by researchers from the US, Germany, and the Ukraine. It is supposed, from this, that a meteor exploded in the atmosphere over Siberia in 1908 (much like the Feb 2013 Russian meteor - but presumably of greater magnitude, or lower altitude).
Nice post at www.q-mag.org/stonesfallingfro/index.html ... on historical accounts of stones falling out of the sky and the resistance by scientists in Europe to the very idea. It begins with a huge iron meteorite in Argentina to get the ball rolling and a rain of stones over Rome during the Punic wars. The Chinese historian MaDuadin compiled reports of meteorite falls in China over 200 years - 337 fell between 700BC and 1920AD (presumably large ones).
As noted a week or so ago, George Howard at http://cosmictusk.com/wittke_pnas_younger_dryas_clovis_comet/ ... posted news of a fresh paper on the YD event. So far he has only the news release and list of co-authors (which include himself). However, another of the co-author's, Kenneth Tankersley of the University of Cincinatti, has been giving his pennyworth -see www.world-science.net/othernews/130520_mammoth.htm
Interesting piece of geology this - the remains of an Alpine forest found in a clay layer. How long did it take the clay to form?
A revised edition of the Secret History of Twin Planet Earth by Errol Hawkins (2007) - see http://malagabay.wordpress.com/2013/04/29/secret-history-of-twin-planet-... ... and www.secrethistoryoftwinplanetearth.net/ ... which is an interesting take on catastrophism - and the Velikovskian history of the solar system. The Earth and Moon came together just 45 to 50,000 years ago, is one of the ideas explored - and it flows out from there.
At www.space.com/21306-moon-craters-asteroid-impacts.html ... a quarter of the Moon's impact craters may retain substantial remnants of the asteroids and meteors that made them. In other words, when scientists claim to be looking at moon rocks - are they? The composition of the Moon has been deduced from Moon rocks brought back by expeditions - manned and unmanned. The problem is some of those moon rocks come from impact craters and could well belong to asteroids and rocks winging their way around the solar system.
At http://cosmictusk.com/wittke_pnas_younger_dryas_clovis_comet/ ... a new paper published in PNAS - George says it is the best yet. This time impact is discarded in favour of multiple airbursts by a disintegrating comet or space rock. The thrust of the article is a riposte to criticism of their methodology so they have gone back to the laboratory in order to stress the point it is all above board. They have collated an assemblage of what they say is impact related proxies - such as microspherules, nanodiamonds, and iridium.
Dr Jeffrey Goodman, The Comets of Gods (available from Amazon in ebook form (for Kindle) but provides a list of sellers (hard copy). This is an attempt to mold catastrophism, from a Biblical perspective, with some parts of science (comets and space rocks etc). It is mooted that God (in the Bible) used objects from space to carry out his bidding.
At http://cosmictusk.com/sheridan-cave-down-but-not-out/ there is a link to a paper in Current Research in the Pleistocene, 28 (2011), Redmond and Tankersley, 'Species Response to the Theorised Clovis Comet Impact at Sheridan Cave, Ohio' say that of 63 flora and faunal taxa recovered from the boundary layer 52 species of amphibians, plants, fish, mammals and reptiles were unaffected by the Clovis come and still thrive in the immediate vicinity of the cave.