“What’s slower than watching paint dry?”
find out in this video about the Pitch Drop Experiment, as reported in the Brisbane Times

Prof Mainstone waiting for the 9th drop

This is a fascinating video. It explains the background and history of the experiment, the fact that, although it appears to be a solid, pitch is actually a liquid, and the failed attempts of seeing one of the pitch drops drop.

Prof Mainstone has been trying for 50 years to see a drop drop. The experiment began in 1927. It is the world’s longest-running experiment. Eight drops in 83 years.