Send a comment on this item to LII: Send a comment on this item to LII staff, who on weekdays will usually reply within 24 hours. About Foucault Pendulums and How They Prove the Earth Rotates! This youth-friendly, tutorial-designed site introduces readers to the background and scientific utility of the Foucault Pendulum and provides information about its inventor, French physicist Jean Bernard Leon Foucault. The site map on the main page provides a convenient index for specific topics. From the California Academy of Sciences. http://www.calacademy.org/products/pendulum/ Asterisk * indicates required field. Your Name Your Email Address * We will not sell or provide your email address to anyone else. Comment * Enter the verification code as it is shown in the box below. This helps prevent automated submissions. *