Philip Ross writes: Fresh analysis of an extinct relative of humans suggests our ancient ancestors dined primarily on tiger nuts, which are edible grass bulbs, settling a discrepancy over what made up prehistoric diets. According to a new study published in the journal PLOS One, the strong-jawed ancient hominin known as Paranthropus boisei, nicknamed “Nutcracker Man,” which roamed East Africa between 2.4 million and 1.4 million years ago, survived on a diet scientists previously thought implausible.
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