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Falling beer bubbles (Posted on 2005-01-12) Difficulty: 2 of 5
If you look closely at a glass of freshly poured Guiness (or any beer--but it's easier to see in a dark ale), you'll notice that some of the bubbles are actually falling instead of rising. Explain how this is possible.

See The Solution Submitted by Ken Haley    
Rating: 4.2500 (4 votes)

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Some Thoughts Another theory | Comment 3 of 9 |
There must be an upward convection movement, that must be balanced by a downward movement somewhere -- bubbles in that current will fall instead of rise.
  Posted by Federico Kereki on 2005-01-12 15:25:35
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