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Intricate ancient tattoos revealed by shining lasers on mummiesThe intricate details of tattoos inked more than 1200 years ago have been made visible by scanning South American mummies with lasers. The mummies, belonging to a pre-Hispanic people known as the ...
[Fjord Carver] brings together an RGB LED and CdS Photoresistor to make ... The LED comes into play by shining known wavelengths of light on the surface being measured. Three separate readings ...
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