On Wed, 11 Sep 2019 at 19:30, William Flynn Wallace via extropy-chat <extropy-chat at lists.extropy.org> wrote: > > How many bacteria (pick your favorite) does it take before they are visible? No fair using magnifying glass. > > bill w > One. <https://en.wikipedia.org/wiki/Thiomargarita_namibiensis> It is the largest bacterium ever discovered. BillK