1928
Medicine
Scotland
Penicillin
Fleming observes a mould killing staphylococcus in a Petri dish.
Why it mattered
Antibiotics turned routine infections from fatal to trivial.
Modern Era
1928
2 recorded milestones at this point in the record.
1928
Technology
United States
Quartz clock
Warren Marrison built an oscillator far steadier than any pendulum.
Why it mattered
The precision timing behind broadcasting, computing and navigation.
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