Some things that exist may not be quantifiable. We need to stop trying to force everything into the math number mold. Some things are abstract. They appear and disappear or change from one state to another. Some things cannot be detected with existing instruments, YET. Big discoveries yet to come.
Einstein would be happy to see our new scientists proving him wrong - he would love to see progress and new results showing C is just the limit for light suggesting other particles may have faster speed limits. So this is two confirmed tests. Time for more - where else can they test this...
Could magnetism from very large metallic objects such as iron cores in planets be mislabeled gravity? Can magnetism attract non metallic matter if it is large enough? Are there papers or experiments to validate/invalidate this hypothesis?
is black hole evaporation in the real universe, or is this just theory? Any actual observations of this phenomenon? Actual observed decreases in size or mass over time?
it's a continuum. There's no going back. this is it. no worm hole. in a smbh all matter squashes to subatomic, then pure energy to an exit - so no traveling through time. tomorrow is a new day, forget the past. trekies.
time can never be future. It appears to be past due to distance and because light takes time. something may appear to be in the future if the distance is reduced quickly, but time can be no sooner than present if there is no distance from the reference point. All things happen now. Future is a...
Space is simply area. A location for matter and energy to be and travel. Air is different, it contains stuff - usually undetectably (not a word - i know) small for us to see. Please don't be rude if this doesn't help.
We will never be able to see the edge of the universe since photons and electrons did not exist at the beginning, but it does exist; it just changes from matter to energy to non-space-time. So physical instruments cannot detect things that are in space-time, but are not matter or energy...
A balloon squished to a single point, suddenly expands in all directions. The surface of the balloon is the outer edges of the universe- if there is such a thing, and the internal contents is the universe. So we can find a center of the universe if we can find it's finite edges, then calculate...