Popular mathematics is
mathematical presentation aimed at a general audience. Sometimes this is in the form of books which require no mathematical background and in other cases it is in the form of expository articles written by professional mathematicians to reach out to others working in different areas.
Notable works of popular mathematics
Some of the most prolific popularisers of mathematics include
Keith Devlin,
Rintu Nath,
Martin Gardner, and
Ian Stewart. Titles by these three authors can be found on their respective pages.
Notices of the AMS - Each issue contains one or two expository articles that describe current developments in mathematical research, written by professional mathematicians. The Notices also carries articles on the history of mathematics, mathematics education, and professional issues facing mathematicians, as well as reviews of books, plays, movies, and other artistic and cultural works involving mathematics.
Audio and video
Simon Singh's Fermat's Last Theorem is available in audio and there is also a Horizon television program.