Quote:
Originally Posted by llama64
We can observe gravity, but there is no scientific method of verifying the mechanism that causes the effect.
At least, not yet.
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Disclaimer: I'm about eight or nine years removed from learning about this (I was a physics minor at university), but IIRC Einstein's theory of general relativity showed that massive objects distort the shape of space-time creating a gravity well, causing objects to "fall" into the well. Objects with larger mass create a deeper well.
A Google search found the below image, which shows this idea quite well.
