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This is Scientific Americans 60 Second Science.

I'm Sarah Vytak.

If you're kitchen savvy, you probably know the water test method for getting stainless steel pans to the right temperature.

All you have to do is splash a few drops of water in a pan as it's being heated.

And when the pan reaches the right temperature, instead of evaporating, the drops will form into beads and they skate all over the pan.

You have to do this test in an empty pan.

And that's because, as the not so kitchen savvy among us may have learned

the hard way, mixing oil and water in a hot pan is a recipe for flying, burning hot liquids. The phenomenon

that happens when beads of water skate around in your empty pan has been understood for a long time.

Here is Dr. Krippa Varanasi from the mechanical engineering department at MIT explaining it.

They're levitating on their vapor layer or the vapor cushion that's forming because the

liquid is evaporating.

And so they can move around with very little friction.

That's called the light and frosted.

And then if you're at a lower temperature, you could start

boiling the drop. But the drop is sticking to the surface. But recently, Dr. Vernasi and his graduate

student, Victor Leon, set out to look at hot oil and water interactions a bit more closely.

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