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By: Hilary Gilson | Published: Aug 19, 2008

Among his myriad scientific and artistic contributions, Leonardo da Vinci's work in embryology was groundbreaking. He observed and diagramed the…

By: Katherine Brind'Amour | Published: Nov 11, 2007

"Effraenatam," the brain-child of Pope Sixtus V, was released as a papal bull in the year 1588. Papal bulls are formal declarations issued by the…