What was the process for blues music becoming standardized to 12 bar phrases and Western Europe fiddle tunes getting standardized to 16 bar phrases?

Any original sources dealing with Nubian, and what today is called Sudan?

Was floor-level QC at Manhattan Project sites like K-25 and Hanford recognizably DuPont-style chemical-process discipline, or did secrecy and surge hiring force a new approach to mass quality control by 1944?

How is it that the mummy of Ramesses II survived as long as it has?

How has the view of Jefferson's Tree of Liberty Letter changed throughout the history of American democracy? When did it come to prominence and how often is it invoked?

Besides WWI, what would Oswald Spengler have seen for him to predict modern business practice, society, and technology?

Was galley slavery worse then American farm slavery?