Coffee stains may seem mundane, but they are actually an interesting quirk of physics. Now researchers have discovered a surprising twist that changes our understanding of how these stains form. It ...

The Coffee Ring Effect is a well-known phenomenon. A puddle of coffee leaves behind a dark ring, instead of a uniform brown stain. This video explains why— and how this phenomenon resembles what ...

Ever notice how a dried coffee stain has a thicker outer rim, while the middle of the stain remains almost unsoiled? This 'coffee ring effect' also occurs in other materials. Researchers have now ...

One of the more famous effects in physics is the Coffee Ring Effect. Leave a drop – or puddle – of coffee on any surface and you’ll come back to a dark ring of stain. This video shows you actual ...

Coffee drinkers are familiar with the ring-shaped stains that result from spilled drops that have dried, in which the brown stain is not evenly distributed, but instead concentrated at the edge. Now, ...

Have you ever noticed how a spilled cup of coffee leaves behind a telltale brown ring? While those stains might be annoying, the science behind them, known as the coffee ring effect, has sparked ...