Is time’s forward motion a fundamental condition of our universe? (Image: Patrick Tourneboeuf/Tendance Floue)
THE aim of science is to explain all the features of the universe, from the mass of the Higgs boson to the fact that the night sky is filled with stars. Perhaps the most obvious feature of all is that time in our universe only travels in one direction: forwards. We remember the past but not the future, and most things about our world are irreversible, from a glass of spilt milk to the birth of a child.
No single feature of our…
