
A question of crema
1 year ago
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Solomon Choi 6 months agoIs it surface tension....? -
Andrew Stribblehill 3 months agoI suspect the answer is the same as for Guinness: the bubbles in the centre are going up then convecting to the outside where they go down. Take a look at chem.ed.ac.uk/guinness/why.html for some details.
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