Bill Nye the Science Guy (1993)

S5E13 Fluids

Liquids are fascinating; they flow and shift. No matter the vessel, a liquid will mold itself to fit its surroundings. When milk is poured into a pitcher, it assumes its form; pour it into a glass, and it adapts again. This adaptability isn’t possible with solid objects like boulders. However, with the appropriate containment, you could even pour molten rock from deep beneath the Earth's surface. Remarkably, fluids maintain their behavior, even when situated deep within the Earth’s crust.