Taste, though, doesn’t just signal what’s good. Bitter sensations especially warn of danger, and genetics confirms that Neanderthals could detect one such compound. Known as PTC,32 it’s found in some plants and is safe only when consumed in small amounts. Intriguingly, this Neanderthal mutation is different to that in many people today and was accompanied by another partially blocking PTC signals. This may mean Neanderthals had a higher tolerance for such flavours, and combined with genetic evidence for a wider array of bitter and sour taste perceptions, sampling unfamiliar plants or fermented
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