Lorsque l’on pense aux engouements du marché, on pense tulipes néerlandaises ou alors biens immobiliers. Mais au 19e siècle, la demande en sangsues médicinales européennes (Hirudo medicinalis) a bien failli conduire l’espèce à l’extinction. Dans toute l’Europe, on vantait leurs propriétés médicinales comme celles d’un remède miracle, et l’on s’en servait pour traiter...
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