Not sure why I thought of it, but I just remembered as a child hearing from my mother about an experiment that was being done in the Physics Department at the University of Wales in Aberystwyth.
My mother was a Bachelor of Science graduate in Chemistry and Mathematics, while my father earned a PhD in Physics, both from Aberystwyth, I believe graduating in the 1940s (not sure of the exact year).
The experiment involved showing that pitch is actually a liquid at room temperature.
For some reason I googled it, and at first was coming up with an Australian experiment claimed to be the longest running experiment, started in 1927 using tar. My initial searches were not turning up Aber
but more searches finally found it! Started in 1914 it seems to have been forgotten until rediscovered in 2014!
One large difference is that tar is thinner than pitch so in fact the Queensland experiment has produced 8 or 9 drops, while Welsh experiment is still drop free with estimates it might take 1000 years for the first drop!
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