Tattoos used to be a sign you were anti-establishment . . . maybe a little impulsive . . . and definitely tough, because those suckers hurt. But maybe not for long, a team at Georgia Tech just invented painless tattoos. Normal tattoos involve a small needle jabbing you over and over. But the new technique doesn’t use needles at all, at least not conventional ones. Instead, there’s a patch with thousands of microscopic needles on one side, so small you can’t even feel them. But the tattoo is still permanent. The needles aren’t even metal. They’re made of tattoo ink that’s encased in a material strong enough to get through your skin, then it dissolves. Each tiny needle represents a single pixel. They can be arranged any way you want to create letters and designs. So instead of a tattoo artist, you could design it on a computer, order the patch online, and stick it on all by yourself. They also say they’ll be cheaper than a normal tattoo. There’s a lower risk of infection, because there’s no blood.