Hi
I’ve been studying pharmacy/medical sciences for all my adult life when i stumbled upon “a brief history of time” by stephen hawking
Anyway,for a person who hasn’t studied physics much..how does “spacetime” exist? I mean einstein abandoned the idea of absolute time
But what is spacetime? And how does time exist as a physical dimension? I mean it’s just something we measure as it passes
How does all this exist?
In: 3
I picture a sort of subway tunnel, with all the universe as a traincar. We’re all doing our thing in the car, and the car is traveling through the subway at a consistent rate (time). So we have the usual 3 dimensions we know about, and we have the fourth which, so far as we know or can discern, only goes one speed and one direction
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