Why are there tiny little stings of bubbles that rise up from the bottom of beers?

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I know that it is carbonation but I want to understand it more… why are there specific areas where “strings” rise up to the bottom?

Thanks!

In: Chemistry

chayashida commented

Imperfections in the glass.

The bubble finds something to stick to, and then more bubbles stick to it, until the bubble it big enough that it floats off and starts the process over again.

Look up nucleation point.