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.

Phys.org reports on 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.
Through the carefully hewn lens, he observed "very many little living animalcules, very ...

