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Gooey Gak

Complex fluids are special kinds of mixtures that have characteristics of more than one phase of matter. In this video, the combination of cornstarch and water resulted in a substance that exhibited the properties of a solid and a liquid depending on the amount of pressure or force applied to it. These types of fluids that don’t behave like what we think of as “normal” fluids are called non-Newtonian fluids. Many non-Newtonian fluids are made of polymers, long chains of repeating molecules that give the fluid unusual physical properties such as flexibility and strength.

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Ocean Priorities

Ira talks with Peter Seligmann, chairman of Conservation International, and with Philippe Cousteau Jr. about the connections between ocean policy, the environment, and the economy.

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