Storm in a tipple glass

January 3, 2003

Physicists at the University of Hertfordshire have been celebrating the festive season with Tia Maria and cream. They used the combination to create the illusion of a planetary storm for an educational video they made for sixth-formers.

Apparently, if you cover a glass of Tia Maria with a layer of cream, you get long-lasting convection currents from the evaporation of the alcohol. And if the system stalls, taking a sip of the Tia Maria with a straw is all that is needed to start the currents flowing again.

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