Achilles and the Tortoise – Solving Zeno’s Paradox with Quantum Physics Posted by CMartucci on Thursday October 20, 2011 @04:22PM from the whatblag.com dept. http://whatblag.com/2011/10/19/achilles-and-the-tortoise-quantum-physics/ ( 2 comments | 3 points | on HN )
You're thinking of the Planck length. It is indeed proposed that the Planck length is the smallest meaningful length, but this is by no means proved.