Microscopes are awesome.
They make minute things look large and allow us to see details normally hidden to the human eye.
A speck of dust contains worlds within worlds, blood cells possess unimaginable beauty, and the amount of complexity going on within a single hair is truly humbling.
But we digress: can you identify what's going in in these images? One of them is used dental floss, which is impressively disgusting.
Note: the quiz was put together by a science bod (with terrible grammar) on Playbuzz