![](http://www.symmetrymagazine.org/sites/default/files/styles/lead_image/public/images/standard/BaBar-time-asymmetry.jpg)
Time ceaselessly speeds onward in our everyday experience, never taking so much as half a step backward. Now, thanks to experimental results from the BaBar collaboration, researchers can be sure that the same is also true for single, isolated particles. Time is indeed asymmetric, even on exceedingly small scales.