More evidence of a comet exploding over Canada 13,000 years b.p. causing global-cooling & extinctions: http://www.eurekalert.org/pub_releases/2009-07/uoc--tdo072109.php http://www.kelowna.com/2009/07/22/more-evidence-found-that-a-comet-smashed-into-canada/ http://uonews.uoregon.edu/archive/news-release/2009/7/californias-channel-islands-hold-evidence-clovis-age-comets http://news.yahoo.com/s/livescience/20090720/sc_livescience/cometkillediceagebeasts http://www.physorg.com/news167329938.html