This Beaver Secretion Was Thought to Cure Ailments

From:Wild Castles: Heidelberg

  • 2m 13s
  • 4K
  • TV-PG

Beavers secrete a substance known as castoreum, which they use to keep their fur waterproof. This made them a target for medieval doctors who used it as a remedy for ulcers, fevers and even rheumatism.