The Science Behind Peanuts Dancing in Beer.

Scientists have investigated why peanuts "dance" when dropped in beer, finding that the peanuts initially sink to the bottom before floating up and acting as nucleation sites for bubbles. The bubbles prefer to form on the peanuts rather than on the glass walls, causing the peanuts to rotate on the free surface and allowing further outgassing. The study has implications for understanding mineral extraction or bubbling magma in the Earth's crust.