Albert Einstein was not wrong, for if he was the entire edifice of material science would also be wrong and all its achievements a figment
This could imply that the ‘virtual’ nature of these particles actually represents a ‘gap’ in current human perception, and that when human scientific understanding advances beyond its current state, what was once thought to be ‘virtual’ particles will be understood in a new light. Of course, such a development in human faculties might well render Heisenberg’s Uncertainty Principle obsolete.
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’.