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by hnlmorg
759 days ago
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Northern China didn’t figure it out until long after the Middle Ages. https://news.ycombinator.com/item?id=40418347 To accurately gauge if something is safe, you need a quick and direct result that is consistent. Unsafe food and liquid isn’t that. Often it’s more a percentage problem. So to solve the percentage problem you then need a larger sample size. And people simply weren’t organised enough to accurately measure at that scale in the periods you’re suggesting. As an aside, this is why people got thrown into volcanos and such like. If you don’t have measurements that are easy to correlate then you’re effectively left to guesswork. |
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