Engineering News -- ScienceDaily

Hologram experts can now create real-life images that move in the air (Fri, 07 May 2021)
They may be tiny weapons, but a holography research group has figured out how to create lightsabers -- green for Yoda and red for Darth Vader, naturally -- with actual luminous beams rising from them.
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Artificial color-changing material that mimics chameleon skin can detect seafood freshness (Thu, 06 May 2021)
Scientists have designed an artificial color-changing material that mimics chameleon skin, with luminogens (molecules that make crystals glow) organized into different core and shell hydrogel layers instead of one uniform matrix. The findings demonstrate that a two-luminogen hydrogel chemosensor developed with this design can detect seafood freshness by changing color in response to amine vapors released by microbes as fish spoils.
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