To establish whether black bears were attracted to period blood, they hooked used tampons onto fishing lines and cast them past ursine noses, then dragged them back again. The working hypothesis was that bears would be as interested by the tampons as by garbage and other control substances. So would I be, if a fishing line holding a used tampon had come sailing past my nose while I was minding my own business. They also exposed human-socialized bears to menstruating women by having them hang out together. After six experiments in various conditions over several years with different tampons,
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