I drop a pen on the floor, then ask 'why' it falls.
The typical response is 'gravity'
try me.
the mass of the earth distorts spacetime in such a way that vector of pen's path through spacetime intersected the planet.
another acceptable question is "why did the earth fall into the pen?" from pen's point of view, it certainly did, and even in a newtonian sense, all masses attract: the earth did move.
Then I ask, but what IS gravity?
Students try various explanations, but in the end they learn that science gives names to phenomena and models phenomena, but it can't say what something is or why it is like it is...only how it behaves.
gravity is the curvature and distortion of spacetime caused by mass.
why does mass warp spacetime? because it's there. that question is about as silly as wondering why you displace water when you go for a swim.
This very fruitful discussion usually results in deep conversations about the nature of the 'ether' of the universe, string theory, cosmology, etc...
sci-fi and philosophy are not science. but general relativity and string theory are. you can ask "how did the rules come to be?" but that's philosophy -- religion.
Science is not a collection of facts. It is a way of thinking and a process by which we strive to understand nature.
yes, this is true. but striving to understand nature does not mean that we do not understand nature.
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