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1928·Antibiotics · Microbiology

What if mold could kill bacteria?

Penicillin

Alexander Fleming returned from holiday to find Penicillium had wiped out Staphylococcus around it in a forgotten Petri dish.

Fleming, Br J Exp Pathol 1929
Saved millions in WWIITry this what-if
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Coffee · Genetics

What if caffeine hits some people way harder because of one liver enzyme gene?

Walks through the CYP1A2 fast/slow metabolizer data, the cardiovascular risk split, and why your friend's fourth espresso is fine.

Exercise · Mood

What if runner's high is actually endocannabinoids, not endorphins?

Lines up the anandamide vs endorphin studies and shows why every marathon guide still quotes the wrong molecule.

Sleep · Mind

What if dreams are your brain rehearsing for threats you'll never face?

Pits the threat-simulation theory against memory-consolidation alternatives and points at where the EEG data actually sits.