A Solid Approach to Old Dung

Coprolites, which are not manufactured to meet to meet any  regulated industry standard, can be examined in a standard way:

A Standardized Method for the Description and the Study of Coprolites,” F. Jouy-Avantin, A. Debenath, A.-M. Moigne, and H. Mone, Journal of Archaeological Science, vol. 30, no 3, March 2003, pp. 367-72. (Thanks to Tom Gill for bringing this to our attention.)

Improbable Research