Support in Times of No Support

In the summer of 2018, the authors of the book were standing in the Musée des Arts et Métiers in Paris. They marvelled at the Foucault pendulum, which made its circular movements on a long rope under the dome. The authors were amazed and wondered, like Casaubon in Umberto Eco's book 'The Foucault Pendulum', what could be at the ideal end of the thread pendulum. The fixed point that could give us s...