Along the same lines a coworker had the pleasure of starting off with scientist that assessed dietary composition via microhystological examination of ground up crap. One can shake out specific plants by the distint size/shape/etc of undigested cell walls. Early on they found ground sloth and cave bear poop in some arid caves, conducted their analyses, and then reported the results.
Title of the first paper: 25,000 Years of the Same Old Sh-t.
Last edited by 1minute; 03/09/14.
