Why do cats land on their feet? Does the speed of light change at a black hole?

Cats land on their feet because it would hurt if they landed on their head. They also have this cool fascia on their back over the spine and no collar bone. I don't know if the fascia makes it happen - it's just cool.

Depends on what kind of black hole you are talking about and at what part of the black hole you are referring to (the edge vs. the center vs. speed measured going into it or coming out of it).

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