Using a nearly invisible laser, researchers can steer a tiny glowing particle through a path in 3-D space to create images that can be seen from almost any angle. Because the technology draws a picture with a single particle, the researchers could create only small images, including a high-resolution picture of Earth about one centimeter in diameter. PARTICLE PAINTING Researchers created a 1-centimeter-wide image of Earth (photographed hovering above a fingertip) by using a nearly invisible laser to drag a glowing 10-micrometer particle back and forth.