Share:Tweet Share on Reddit (Opens in new window) Reddit Email a link to a friend (Opens in new window) Email MoreShare on Tumblr Print (Opens in new window) Print Like Loading... Trackbacks are closed, but you can post a comment. Nail fingernail talon claw Denise Schmandt-Besserat, The Earliest Precursor of Writing (Scientific American. June 1977, Vol. 238, No. 6, p. 50-58.)