He goes on to use an example of how much effort it might take to add 3D swirling smoke around a character that parts as he passes through it.

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Light-emitting diodes--semiconductors that emit light when electricity passes through them--have been around since the 1960s.

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Ideas of minimizing the noise of a jet as it passes through the sound barrier have been around since Concorde first deafened those living under its flight paths and beyond in 1976.

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During the dance, partners move through a series of passes and turns in a star formation, pivoting around each other before meeting in the centre for a final bow.

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