Thanksgiving is almost here and, perhaps, you're planning to brave the deep fryer.
You've got the oil. You've got the pan. You've got the fire. You should be good to go, right?
But, how do you know the oil is ready?
Researchers in the field of fluid dynamics have a trick – use your ears.
The scientists were inspired by a classic kitchen hack, used to test tempura-frying oil. You wet the pointy end of a wooden chopstick, stick it into the oil, and listen.