Below is a list of some other historical topics that have led to the emergence of very important mathematical ideas. Select one, or find one of your own, and research the topic on the Internet. Summarize your findings using your notes.

• Arabic numerals and the invention of place value
• Babylonian number systems and the relationship to the number of minutes in an hour
• Which cultures developed lunar calendars, and how do we use those findings today?
• Which cultures knew about π? How did they apply the value of π?
• Which cultures knew about prime numbers? What did they do with this knowledge?
• Did the Romans use fractions? If so, how? If not, how would they represent a number between 1 and 2, or between 9 and 10?
• Why did some cultures, such as the Arabs, use base 10 number systems, while other cultures, such as the Mayas, use base 20?