Is time a substance, particle, force or concept? Is it one big “block”, so the future already exists and “now” is subjective? Or is the present the only place that’s real? Are most physicists determinists?

Question

I have studied a little of this in philosophy (metaphysics, epistemology and ontology) but I really need a scientist (preferably a physicist) to break down what we actually know about the world, as I regrettably have no formal education in physics and can’t work this one out on my own. Thanks 🙂

In: Physics

Answer 1

[Watch this video](https://youtu.be/UKxQTvqcpSg) for an explanation of spacetime. I happened to be watching it just now and saw this post!