How big is a 'fragment'?

When a drinking glass falls on the floor and breaks, the shards will vary in size from large to extremely small. For the broken glass of a bus shelter, the story is different: all fragments have roughly the same size. Researchers from the University of Amsterdam, Unilever Vlaardingen and EPFL Lausanne investigated the breaking phenomenon, and discovered that two very different processes cause the two types of shards. The results were published in Nature Communications this week.