Arizona Science explores the latest scientific research and technological innovations taking place in Southern Arizona and at the University of Arizona.
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Episode 199: A history of eating
A recently published study by University of Arizona evolutionary biologists made some unexpected discoveries about what animals eat and why. John Wiens and his colleagues studied a thousand species and created a biological family tree. They say dietary habits for animals, including dogs, cats, cows and humans, can be traced back 800 million years.