In this project, you will estimate the circumference of the earth, using a method developed about 2,200 years ago, by Eratosthenes, a Greek mathematician and the librarian of the great library at Alexandria, in Egypt.

This site provides a biography of the mathematician, writer, and advocate of women's rights, Sofia Kovalevskaya (1850-1891 CE).

Helena Rasiowa was a Polish mathematician who achieved great mathematical accomplishments despite the dangers she faced during the German invasion of Poland. Read more about her life and work in this biography.