Consider throwing a ball straight into the air.

Can you predict the motion of the ball after it leaves your hand?

Sure, that's easy.

The ball will move upward until it gets to some highest point,

then

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Why do cats do that?

They're cute, they're lovable,

and judging by the 26 billions views of over 2 million YouTube videos

of them pouncing,

bouncing,

climbing,

cramming,

stalking,

clawing,

chattering,

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