In the spirit of "Nova," the hour demonstrates the ways that theory leads to practice.

The theory has led to other, more specific theories.

Both theories lead to rate equations of the same exponential form.

As shown by the Einstein example, where a theory led the other way round, the model does not fit much of science.

That theory led directly to the nuclear winter hypothesis.

Every new political theory, by whatever name it called itself, led back to hierarchy and regimentation.

The theory even led to the discovery of a new planet, Neptune.

The financier could see where Vic's theory would eventually lead.

Even a genetic theory would lead you to that conclusion.

This theory of reality led to a radically different approach to science: