Mary Engle Pennington: The woman who transformed America's food safety standards

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Mary Engle Pennington faced barriers to studying science simply because she was a woman, but went on to become one of America's leading food safety pioneers. After her request to study chemistry was rejected by her school's headmistress, she pursued higher education at the University of Pennsylvania, where women were not awarded degrees at the time. She eventually earned a doctorate in chemistry in 1895 and became the first woman to head the Food Research Laboratory in 1906.

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