“No single feature of our universe is more in need of explanation than the forward march of time,

yet physics and cosmology have so far failed to explain this basic fact of nature…”

Lee Smolin, “It’s time to rewrite time”, New Scientist, 20 April 2013, pp. 30-31

“…The only way we can explain the time asymmetry of our universe [that time only goes in one direction] is some mathematical trickery which involves choosing special solutions to time symmetric laws. Which is to say it is not explained at all.”

“Ever since Rene Descartes in the 17th century, time has been represented as if it were just a dimension of space. This culminated in the “block universe” conception of general relativity in which the present moment has no meaning – all that exists is the whole history of the universe at once, timelessly. When laws of physics are represented mathematically, causal processes which are the activity of time are represented by timeless logical implications….

“The idea that nature consists fundamentally of atoms with immutable properties moving through unchanging space, guided by timeless laws, underlies a metaphysical view in which time is absent or diminished. This view has been the basis for centuries of progress in science, but its usefulness for fundamental physics and cosmology has come to an end due to its inability to answer key questions…A new scientific world view is emerging based on the principles that time is real, laws evolve and irreversibility is fundamental…”