In 1851, the French physicist Léon Foucault provided an experimental proof of the Earth’s rotation using a pendulum. Although Foucault is best known for this ingenious experiment, he also made several ...

Once upon a time, you were probably on an elementary school field trip at a science museum or an observatory. Just before lunch, your teacher had the class stand in a circle around an enormous weight ...

Most of us accept that the Earth rotates because we have been taught it since childhood. We have seen satellite images, watched footage from space and learned about day and night. But imagine living ...

36.5 x 27 x 13.5 cm. (14.4 x 10.6 x 5.3 in.) ...