In 2020, Borry et al. developed an “ID” method for determining this substance’s source. Population trends in ancient settlements can be determined by comparing the amount of a certain 27-carbon stanol with its “epi” derivative in this substance. They aren’t bog bodies, but “paleo” examples of this substance form protective outer shells thanks to the Maillard reaction. An extremely large example of this substance belonging to a Viking is named for Lloyd’s Bank. The presence of this substance in the Paisley Caves is some of the earliest evidence of (*) human habitation (10[1]-5[1])in North America. Mary Anning discovered the first coprolites, which are (10[1])fossilized examples of this non-hair substance (10[1])that can be analyzed to determine parasitic infections or diet. For 10 points, name this substance which, when used as fertilizer, is called manure. ■END■