Post #5260 602 Feb 23, 2026, 15:45 UTC How much of 'us' is really 'us?'Source: Phys.org@EverythingScience phys.org How much of 'us' is really 'us?' Some time around 1683, amateur Dutch scientist Antonie van Leeuwenhoek scraped the plaque from between his teeth and peered at it through a home-made microscope. ❤ 2