Mathematicians have come up with a formula that predicts how the head on a pint of beer will change after pouring. Excerpt:
Their advance could shed light on why the foam on a pint of lager quickly disappears, but the froth on a pint of Guinness sticks around.
The research could not only provide tips for better brewing, but could also have applications in metallurgy, say the authors.
Details of the work by mathematicians in the US appear in the journal Nature.
(If i had a math for beer icon, i'd use it...)