Scientists have developed a revolutionary technique for creating colors that can change on command. These are structural ...

Learn what those white specks or crystallized patches on your cheese are, if the cheese is still safe to eat, and how to tell ...

Photonic crystals are periodic optical structures that can control the flow of light. Multiple reflections from surfaces separated by a distance similar to the wavelength prevent an optical beam from ...

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In the early 1900s, Wilson A. Bentley sent 500 prints of his snowflakes to the Smithsonian to ensure their safety for the future. The images are now part of the Smithsonian Libraries and Archives.