“We’ve made little progress since Einstein – until now. Some theorists, in their frustration, revert to Augustine’s deduction: that the flow of time is an illusion. Although this conclusion doesn’t fall within the realm of science (how could you falsify it?), it provides a convenient excuse for ignoring the most salient aspects of time, the flow and the now, the aspects that are at the heart of human experience. Now, in the early 21st century, it is time once again to examine the meaning of time.” Physicist Richard A. Muller explains why.