Scientists Invent a Way to Brew Espresso With Ultrasonic Waves—No Hot Water Required
What do you need to make a good espresso? Ground coffee, of course; a machine capable of generating pressure; and hot water, preferably heated to between 195 and 205 degrees Fahrenheit. And that’s it. But could one perhaps do without that last element? No, not the water itself, but the need to heat it. The … Read more
