CNN.com – Guinness mystery finally solved – Mar 15, 2004:
Scientists said Monday they had finally proved that the dark stout’s creamy bubbles defy expectations and flow down instead of upwards.
“Our group carried out preliminary experiments at a local pub a few years ago, but the results proved inconclusive,” said Dr. Andrew Alexander, from the University of Edinburgh’s School of Chemistry.
I’m not sure I concur: I may have to conduct my own experiments.