Fossil Scans Reveal Origins of Teeth [Video]

[Bok]

Which came first: fangs or bony armor? For years, paleontologists have thought that the first bones to emerge were teeth, and that the protective armor coverings of early fish, made of similar...

-- Read more on ScientificAmerican.com http://feeds.feedburner.com/~ff/ScientificAmerican-News?i=BKYyrDaCRn8:g2lduMMwReY:V_sGLiPBpWU (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/ScientificAmerican-News?i=BKYyrDaCRn8:g2lduMMwReY:gIN9vFwOqvQ (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:gIN9vFwOqvQ) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=cGdyc7Q-1BI (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:cGdyc7Q-1BI) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=QXVau8BzmBE (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:QXVau8BzmBE) http://feeds.feedburner.com/~ff/ScientificAmerican-News?i=BKYyrDaCRn8:g2lduMMwReY:F7zBnMyn0Lo (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:F7zBnMyn0Lo) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=l6gmwiTKsz0 (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:l6gmwiTKsz0) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=I9og5sOYxJI (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:I9og5sOYxJI) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=qj6IDK7rITs (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:qj6IDK7rITs) http://feeds.feedburner.com/~ff/ScientificAmerican-News?d=yIl2AUoC8zA (http://rss.sciam.com/~ff/ScientificAmerican-News?a=BKYyrDaCRn8:g2lduMMwReY:yIl2AUoC8zA)
http://feeds.feedburner.com/~r/ScientificAmerican-News/~4/BKYyrDaCRn8

More... (http://rss.sciam.com/~r/ScientificAmerican-News/~3/BKYyrDaCRn8/article.cfm)