Blue Bubbles

Clouds in a Glass of Beer: Simple Experiments in Atmospheric Physics (Bohren Craig F.)

Ever wonder why steam rises from a bowl of hot soup or why a greenhouse retains heat? And have you ever puzzled over the real meaning of once in a blue moon or why sand is darker when its wet than when its dry? And just why, exactly, do bubbles appear in a glass of beer when you add salt to it? Thes...