Why does espresso float on milk?

Question

instead, only the boundaries of these layers mix: the hotter liquid heats up a section of the cooler, denser liquid (like milk) causing it to slightly rise, and the cooler denser layer chills out some of the less-dense layer (coffee) causing it to slightly sink.

Faunted1948 · Answer 1 · 2022-04-10T12:30:31+0000

instead, only the boundaries of these layers mix: the hotter liquid heats up a section of the cooler, denser liquid (like milk) causing it to slightly rise, and the cooler denser layer chills out some of the less-dense layer (coffee) causing it to slightly sink.

Why does espresso float on milk?

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