The picture is a magnified image of a burnt crumb which was recovered from the buried remnants of a fireplace, not a moldy morsel of bread.
When an archaeologist working on an excavation site in Jordan first swept up the tiny black particles scattered around an ancient fireplace, she had no idea they were going to change the history of food and agriculture.
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When Arranz-Otaegui sifted through the swept-up silt, the black particles appeared to be charred food remains. "They looked like what we find in our toasters," she says — except no one ever heard of people making bread so early in human history. "I could tell they were processed plants," Arranz-Otaegui says, "but I didn't really know what they were."