Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years. Yacold also

partners with nature portfolio to advance gut microbiome science through the global grants for

gut health, an investigator-led research program. To learn more about Yachtold, visit yawcult.co.j

That's Y-A-K-U-L-T dot-C-O-J-P. When it comes to a guide for your gut, count on Yacult.

This is Scientific American 60 Second Science. I'm Cynthia Graber.

Many people remember the colors of the rainbow by the acronym Roy G. Biv for red, orange, yellow, green, blue, indigo, and violet.

Well, the color indigo just made news. Indigo gets its name from the plant Indigo Faratinctoria and its relatives,

which supply the dye that makes fabric the rich, beautiful color between blue and violet. Indigo Faratinctoria and its relatives, which supply the dye that makes fabric the

rich beautiful color between blue and violet. Indigo dye was used around the ancient world in

fabrics created from Egypt to China to Meso and South America, and it's in South America that

researchers recently found the oldest known example of fabrics dyed with indigo. The artifacts were

discovered at Waka Prieta,

a ceremonial mound on the coast in northern Peru, but their color was initially hidden by the

gray tones that had leached into them from the materials used in the mound itself. But when a

conservator carefully washed the fabric, the true colors reappeared. And it was at that point that I

realized we had probably had indigo and it was probably

the world's oldest indigo.

Jeffrey Splitsdoser, an anthropologist at George Washington University.

Which was really exciting.

I hadn't thought I'd be discovering, or we would be discovering the world's oldest

indigo when I took on this project.

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