Nature research paper: Testosterone histories from tusks reveal woolly mammoth musth episodes
, Using a 1-mm cylindrical diamond grinding bit, powder samples were collected using a computer-controlled Merchantek Micromill., Projection of microCT scan data, showing average luminosity for a 1-mm-thick slice parallel to and 0.5 mm below the surface used for sampling., Sample boundaries were planned based on annually recurring features visible in microCT. Each year of growth was divided into ~0.5-mm-wide increments.
, The same sequence of powder samples was collected on two different occasions from the disc-1 block of UMMP 118711. The two sampling episodes were several weeks apart, and the slab was exposed to moderate heat when removing it from the milling stage after the first iteration. Testosterone was lower in the second set of analyses, likely a consequence of heat exposure., When values are normalised to the average of the five lowest values in the batch, plots match closely.
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