Mastodon Tooth: Davy Villanueva Finds Ancient Molar In San Antonio River i.huffpost.com/gen/803364/thumbs/r-MASTODON-TOOTH-large570.jpg 10/05/2012 http://www.huffingtonpost.com/2012/10/05/mastodon-tooth-davy-villanueva-san-antonio_n_1940331.html [with comments]