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My French granny says it is more hygienic to poo in a big hole in the garden, like she did when she was growing up, than it is to go inside. She also said that in olden days, people collected pee and used it to make plants grow better. An earlier question in The Last Word gave warnings about eating leftover rice.

Is it because feral domesticated animals can somehow live on in poor health through their association with humans, whereas nature would ruthlessly pick off any weaklings in the wild animal population?The ratio of carbon-12 to carbon-14 at the moment of death is the same as every other living thing, but the carbon-14 decays and is not replaced.The carbon-14 decays with its half-life of 5,700 years, while the amount of carbon-12 remains constant in the sample.The use of various radioisotopes allows the dating of biological and geological samples with a high degree of accuracy.However, radioisotope dating may not work so well in the future.

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