In the 5 impossible things before breakfast category:
Two undergrads built a device that can put out an alcohol fire with sound waves!
Turns out low frequency sounds in the 30-60MHz level - the sound waves will disrupt the oxygen and separate the oxygen from the fuel long enough to extinguish the fire. They still need to scale it up and try it on other burning materials but, who knows, someday perhaps all stove hoods will have speakers installed....
What separates good chocolate from the most exquisite chocolate? Celebrate Valentine’s Day and join Dr. Rich Hartel as he returns to share how tempering, crystallization, and chemistry can make all the difference when selecting your favorite chocolate treat.