How did man discover yeast?

Answer 1

Yeast has been used in bread making and fermenting since before writing was discovered. So who ever first used yeast was never recorded. Yeast has changed a bit though - there are now several kinds of yeast Active Dry Yest was invented during WWII, and Red Star introduced Rapid Rise Yeast in in 1982, there is now something called Instant Dried Yeast that is new to me. See the link below for more information.

Answer 2

Yeasts naturally occur in the skin of fruit. The 'bloom' or grey powder on the surface of grapes on the vine are yeast waiting to get at the sugar in the Grape Juice when the skin is broken.

Early man would have collected fruit and stored it during a glut. They would notice that the juice would start to bubble after a week or so in storage. Not wishing to waste this food it was drunk and would cause mild intoxication since the yeast has excreted alcohol.

Wine had accidentally been made and the rest is history, hic!

Answer 3

Louis Pasteur 1822- 1895

Answer 4

Noone :)

Answer 5

Louis pastur