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https://protectingsight.com/2021/01/06/protecting-sight-207-atomic-clocks-satellites-a-smartphones-location-zonular-dehiscence-and-endophthalmitis-microbiologic-cultures-john-adams-as-a-15-year-old-harvard-student/
Protecting Sight #207: Atomic clocks, satellites, & a smartphone's location. Zonular dehiscence and endophthalmitis microbiologic cultures. John Adams as a 15 year old Harvard student