Arm tattoo before and after light activation. (Matter& Light, Bruns et al. via SWNS)
A new generation of “invisible” tattoos switches on and off under different kinds of light.
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(Matter& Light, Bruns et al. via SWNS)
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Author Carson Bruns shines light on his Phototat leg tattoo. Arm tattoo before and after light activation. (Matter& Light, Bruns et al. via SWNS)
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