Three flasks opened by Pasteur in various localities: left to right: Poupet, Montanvert, Mer de Glace: during his experiments to disprove doctrine of spontaneous generation.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Three flasks opened by Pasteur in various localities: left to right: Poupet, Montanvert, Mer de Glace: during his experiments to disprove doctrine of spontaneous generation. Wellcome Collection. Source: Wellcome Collection.