The generally accepted concept regarding our physical worldview is that the universe forms and exists in a four-dimensional spacetime, cons...

 Energy is the defining property of our physical world, and therefore the most important tool for understanding nature, hence the most commo...

 According to the current view of science, elementary particles, like electrons or quarks, are elementary because they cannot be broken down...

 A general definition of symmetry: If a certain change does not change a property, then that property is symmetric with respect to that part...