Science story
Strange purple dye 'more expensive than gold' from sea snails
A Tunisian history enthusiast has tried to recreate making dye from sea snails that was once only used by members of the ancient royal family, the elite.
Purple Dye
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Articles about Purple Dye
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Archeology
1500 year old Bible written in ink from urine
Rehabilitation experts in Italy discovered purple dyes to create one of the oldest New Testament writings made from lichen combined with fermented urine.