Nature of Time

Submitted by jenn94 on April 6, 2017 - 2:26pm

Time is the most fundamental aspect of our experience, and yet it remains mysterious in many ways. A longstanding problem is time's arrow – the directionality displayed by most physical processes, for example, clocks run down, organisms age, stars burn out. The laws of physics are symmetric in time, so the appearance of asymmetry from symmetry can be understood only by looking outside the system. Ultimately that leads to cosmology.