A new type of hologram provides a 3-D image without glasses. And unlike many traditional holograms, this one comes in color. Current 3-D television technologies rely on overlapping images to give the illusion of depth. But the new technique, developed by Japanese scientists and published in the April 8 Science, uses white light to energize electrons in a thin film of metal. This energy reveals a hologram pre-etched by lasers into a second, overlying layer. Colorful apples, roses and origami cranes created this way maintain their appearance when seen from different angles, unlike the kinds of holograms used on credit cards. —Devin Powell
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.