APAD: Necessity is the mother of invention

Meaning:

When a problem presents itself, clever minds will find a solution

 

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In the past a Pharoah would not dream of visiting Babylon for a summer vacation,

too busy overseeing the design and construction of his pyramid. Many years and

inventions later, can we imagine him less pleased than today's cruisers swinging

by one picturesque spot after another in the pursuit of happiness?

 

Who's the mother of necessity?