The first microscopes, in the 1500s and 1600s, transformed glass panes that looked completely transparent into a universe teeming with bacteria, cells, pollen and intricate crystals. These visionary aids were the first devices to show people that there were cells within a drop of blood. Since then, microscopes have opened up other invisible worlds for scientists, going within cells or down to the scale of atoms.
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Video Microscope Reveals Movement in "Stock-Still" Objects
A new “motion microscope” reveals tiny changes in objects—and people—that appear to be stock-still