Context: GelSight can register “physical features less than a micrometer in depth and about two micrometers across,” which means it can create a 3D image of ink

Context: GelSight can register “physical features less than a micrometer in depth and about two micrometers across,” which means it can create a 3D image of ink on a piece of paper (below): Below that there is a 3D image of ink on a piece of paper. Taken with a handheld device. "Wow" about covers it, although I might go with "WOW."