Tattoos are forever, right? Well, maybe not like we once thought. You can get them removed (though laser tattoo removal is nothing to scoff at), get an ephemeral tattoo that fades in a few years, or ...

Humans have been using the same tattooing technologies for thousands of years. It's time for an upgrade. The Laboratory for Emergent Nanomaterials is re-thinking the tattoo pigment as a way to ...