Despite being tens of millions of years old, some beetle fossils appear almost as they did in life. Not only is their shape and structure preserved, but the actual colors of their shells, which have changed only slightly in the intervening eons.
Arthropods possess a diversity of sophisticated color vision systems: From tetrachromacy (having three color channels, like us), to the pentachromacy of butterflies, and the seemingly-absurd dodecachromacy of mantis shrimp.
Researchers have developed a new way to create true-color holograms that can be viewed from any angle using ordinary white light. The advance could lead to a new generation of electronic devices, such as cell phones or miniature televisions that display three-dimensional (3D) images.