Are you ready for the best pranks on sisters and friends? Dropping a closet on a dummy, putting garlic in strawberries, pouring flour - we know exactly how to make fun of someone! | 123 GO

Ever seen an underwater explosion? The pulsing is what’s called a cavitation cycle. The expanding gases push as far as they can until the water pressure overcomes the outward force of the gas. Then the bubble collapses to a point where the gas exerts more force than the water so the bubble expands again. This cycle perpetuates until the gases cool to a temperature where they no longer expand. | Now Science News