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Meaty puzzle: Did TB evolve to boost hungry brains?

A meat diet fuelled the development of our big brain, but what happened when it ran short? We fostered a dangerous ally

By Adrian Williams and Robin Dunbar

18 June 2014

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

When meat was scarce, did TB help out? (Image: Plopparelli/Tendance Floue

PHTHISIS. Consumption. King’s Evil. White plague. Tuberculosis has had many names. Call it what you like, it was and still is a deadly disease, killing between 1 and 2 million people every year. But we think that humanity’s relationship with this pathogen is far more complex than it first appears. In fact, it could have played a vital role in human evolution.

“Humanity’s relationship with this pathogen is more complex than it seems”

This counter-intuitive idea arose from a seemingly unrelated area of study: our ancient ancestors’ meat-eating culture.…

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