Oobleck is a non-Newtonian fluid, which is a fancy term for a liquid whose viscosity varies with pressure. Is it a rock? Is it a liquid or solid? It’s both! Making your own oobleck is a simple, ...

"Oobleck" is a strange fluid made of equal parts of cornstarch and water. It flows like milk when gently stirred, but turns rock-solid when impacted at high speed. This fascinating phenomenon, known ...

Oobleck has long been my favorite example of a non-Newtonian fluid, and I’m not alone. It’s a hugely popular “kitchen science” experiment because it’s simple and easy to make. Mix one part water to ...

An aluminum rod just before (left) and just after (right) it strikes the surface of a cornflour and water suspension. Rather than penetrating, the rod causes the suspension below it to solidify for an ...

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