This story is a supplement to the feature "Using Causality to Solve the Puzzle of Quantum Spacetime" which was printed in the July 2008 issue of Scientific American. A Whole New Dimension to Space In ...

Imagine, if you can, the ability to move in an extra direction: one beyond up-and-down, north-and-south, or east-and-west. That there's an independent direction beyond our conventional notions of x, y ...

PBS Space Time is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and ...

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