Finally, last Sunday, I set up the new friction shifters on the downtube of my old Raleigh bicycle. It’s a long story, with a happyish ending.

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On the left, seeds and an ear of bread wheat, which is free threshing. The seeds are easily separated from the ear and the chaff that surrounds them. On the right, ear and "seeds" of einkorn, a hulled wheat. The seeds remain surrounded by the tough protective layers. Photo by Mark Nesbitt.

Ancient grains used to be rare and hard to find not because they contained some magical secret for a long and fulfilled life, but because they take a lot more work than modern wheats. Instead of the wheat berry popping free after a gentle rubbing, they need to be bashed and pounded. Now, of course...

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A selection of Natufian mortars, gray rocks with a depression in them, one of which has the pestle used to grind grain in it, in a museum display case in Haifa, Israel.

Cultivation is not the same as domestication. Domestication involves changes that do the plant no good in the wild, but that make it more useful to the people who cultivate it. Seeds that don’t disperse, for example, and that aren’t all that well protected from pests and diseases. In this episode,...

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Wheat seeds

A single cell of modern bread wheat contains more than five times the DNA of a human cell, in a much more complicated arrangement. As a result, it has taken a fair old while to decode wheat’s genome. Having done so, though, the DNA confirms what plant scientists have long suspected; bread wheat is...

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Excavation of a stone-lined fireplace in the centre of a paved area, where the oldest bread crumbs were found. Photo by Alexis Pantos

Back in 2018, archaeologists celebrated the oldest crumbs of burnt toast in the world. But have you stopped to wonder how they found those crumbs? The bread they came from was a fine, mixed grain loaf that might well have been a special dish at a feast. It is even possible that bread was the fir...

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