Kombucha cultures can be turned into flexible electric circuit boards

The skin of yeast and bacterial cells that forms on the brewed drink kombucha could be used to make cheap, flexible circuit boards for wearable electronics like heart monitors or even partially living computers

Are the tannins in tea really tannins, asks one reader.

And what about fluoride levels in cheap tea?Lager originated in Europe but the wild yeast species that was first used for brewing the beer hadn’t been found there until now – it was lurking in the soil at an Irish universityMaker of beer, bread and wine, yeast is our biggest microbial friend. Now we're engineering weird new flavours with it - even lager that tastes of somethingMany foods thought to enhance our natural defences, such as orange juice and turmeric, don’t live up to the hype.

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