Mersenne, Marin (1588-1648)
Mersenne was a French priest who played an important role in mathematics. Mersenne corresponded with numerous mathematicians throughout Europe, passing important information between them. There were no scientific journals during his time, so he played the role of a disseminator of valuable information. He frequently met with Fermat, Roberval, and Pascal. His own work was in generating prime numbers and extending Galileo's work in acoustics. Mersenne actively defended Galileo and Descartes against attacks from the church.