Watch | Episode### Inside Einstein's Mind

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Retrace the thought experiments that inspired his theory on the nature of reality.

The answer, it turns out, involves some pretty serious physics.

Join scientists as they grab light from across the universe to prove quantum entanglement is real.

Learn about the origins and meaning of “p-value,” a statistical measure of probability that has become a benchmark for success in experimental science, in this video from NOVA: *Prediction by the Numbers*.

Explore how probability can be used to help find people lost at sea, even when rescuers have very little information, in this video from NOVA: *Prediction by the Numbers*.

Examine a mathematical theory known as the “wisdom of crowds,” which holds that a crowd’s predictive ability is greater than that of an individual, in this video from NOVA: *Prediction by the Numbers*.

Trace the dramatic growth of human populations over recent centuries on our global map, and see where on Earth as many as three billion more people may live by 2050.

The spinning of Earth means we don't always see straight paths as straight.

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