I confess there are several parts of this Constitution which I do not at present approve, but I am not sure that I shall never approve them. For having lived long, I have experienced many instances of being obliged by better information, or fuller consideration, to change opinions even on important subjects, which I once thought right, but found to be otherwise. 

—Benjamin Franklin

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According to the book of Genesis, God created Eve from one of Adam’s ribs. As a result, Judeo-Christian tradition long held that men had one fewer rib than women. Despite the abundance of available evidence to the contrary, that belief survived for some fifteen hundred years, until the Flemish anatomist Andreas Vesalius, a pioneer of modern anatomy and a champion of medical dissection, finally showed otherwise.