At the Houston Museum of Natural Science they recently made a disturbing discovery: their Foucault pendulum had stopped swinging for the first time since its installation in the 1970s. (Video, ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Earth's Rotation Day commemorates the significant discovery by French Physicist Leon Foucault. In 1851, Foucault proved that Earth rotates on its axis, using a swinging pendulum famously called ...

Fifth-graders in Becky Tobin’s class at Hammond Westside Elementary Montessori conducted a scientific investigation lesson Nov. 9 to determine what factors affect the period of a pendulum. Students ...