No scientific theory is beyond improvement or dismissal (if proven wrong). Human scientific understanding has ‘evolved’ over-time, moving toward an ever greater, or more subtle
The work of Albert Einstein relativity theory states that it is impossible to travel faster than the speed of light. Light travels at 186,000 miles
Another way in which these ‘unseen’ substances are known to be present is through the effect they appear to have on objects moving through what was once thought to be ’empty’ space. There appears to be a ‘gravitational’ effect on objects moving through apparently ’empty’ space that should not be happening if space was in fact ’empty’.
Although theoretical physics postulates that other dimensions may exist (i.e. ‘String Theory’ and ‘Quantum Theory’, etc), these realities are mathematical probabilities, and not the product of sensory observation in the usual or mundane sense.
In the meantime, individuals can choose to progress human evolution by deciding to think beyond the current socially accepted limitations of perception. This may not be easy – as sometimes the powers that be will attempt to oppress any progress in a certain direction that might deprive a privileged minority of their power and influence. In reality, progression requires bravery, insight and resolve.