Word: gravityâ
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...since Newton had anyone devised a more precise explanation of gravity???the universal "glue" that pervades everything, from minuscule atoms to massive stars. Yet for all the significance to modern physics of Einstein's 1915 general theory of relativity, his complex equations have still not been proved beyond a shadow of a scientific doubt...
...powerful telescope, no one has seen?or ever will see?black holes. Thus, for the time being at least, these inkblots of space are mere mathematical figments. So far, they can be shown to exist only as solutions to the complex equations of general relativity?Einstein's theory of gravity???and very troubling
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