the.com/bread mold

the green fuzz that gave humanity its first antibiotic and its last forgotten sandwich

means The fuzzy fungal growth—often green, white, or black—that colonizes bread and other foods as they spoil.

from "Bread" is ancient Germanic, akin to Old English brēad, perhaps tied to a root meaning "to brew" or "fragment." "Mold" in this sense comes from Middle English mowlde, related to a verb meaning "to grow moldy," possibly via Old Norse mygla ("to become musty"); it's a separate word from the "mold" you cast metal in, which traces to Latin modulus. So the phrase quietly stitches together two old Germanic threads: the staff of life, and the slow musty thing that claims it.

penicillin source
Fleming's miracle drug came from related mold
invisible roots
fuzz on top means threads run throughout
toxin risk
some molds produce dangerous carcinogenic mycotoxins
loves warmth
spores germinate fastest in humid, room-temperature kitchens
airborne always
mold spores float in nearly every breath you take
for instance

neurospora crassa — fungus used in 1941 nobel prize-winning genetics research by beadle and tatum

rhizopus stolonifer — black bread mold, common household contaminant visible within 2-3 days on stored bread

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