The first Foucault’s pendulum I ever saw was at the Franklin Institute in Philadelphia, the city where I was born. The pendulum hung in a stairwell. Its wire was attached to the ceiling four stories ...

In the months following Jean Bernard Leon Foucault's early 1851 demonstration in Paris of the earth's diurnal rotation with a vibrating pendulum, members of the entire scientific community, as well as ...

A stunning discovery in the cellar -- Ancient logic: Bible and inquisition -- Failed experiments with falling bodies-- A science "irregular" in the age of the engineer -- The meridian of Paris -- ...