It resembles a mushroom cloud, but in fact, it’s one of our microscopic
nanolasers, imaged under an electron microscope. These lasers are among the
smallest in the world, so small you could fit a billion of them on an iPhone
home button, small enough to one day fit easily
![(Untitled)](/content/images/size/w795/848b6b5a09990f916c0a35b265bc925c/tumblr_n5bti2gZel1spzrmao1_1280.jpg)