re: #568 klys

Pitch drop experiment caught on video … finally

Is pitch a liquid or a solid? It turns out that while it appears to be a solid at room temperature, it actually flows like a liquid … a very, very viscous liquid. Why is this interesting? One of the world’s longest running experiments, which began nearly 70 years ago at Trinity College Dublin, has now recorded the fall of a drop of pitch on video for the first time.