Another instance of their "clever"ness? http://www.scientificamerican.com/article.cfm?id=just-how-smart-are-ravens http://www.scientificamerican.com/article.cfm

Another instance of their "clever"ness? http://www.scientificamerican.com/article.cfm?id=just-how-smart-are-ravens http://www.scientificamerican.com/article.cfm?id=just-how-sm...