Scientists have created the tiniest painting ever, the Mona Lisa that you can see here. It’s only 30 microns—less than half the thickness of a human hair. If that’s hard to imagine, look at the comparison: If this microscopic Gioconda were a tattoo on an ant, it would only take a minuscule fraction of its eye.
https://gizmodo.com/you-wont-believe-how-tiny-the-worlds-smallest-mona-li-1033085106
