Why do some people eat soil? From a prisoner’s lifeline to a modern tasting menu, the history of geophagy

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When I ask people if they have ever eaten soil before, they tend to give me a strange look. But geophagy – the deliberate ingestion of any kind of soil – is a practice that archaeological evidence from Kalambo Falls in Zambia suggests has been part of human history for at least 2 million years.


Green hydrogen is a boondoggle

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President Cyril Ramaphosa gets super-excited about green hydrogen. Back in the real world, however, green hydrogen is an inefficient pipe dream that won’t reach maturity in decades, if ever.