One thing most coffee lovers agree on is that good espresso starts with hot water. A team of researchers in Australia is challenging that idea. Scientists at the University of New South Wales say they ...

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Ultrasonic espresso brewed at room temperature matched traditional shots in blind taste tests while cutting energy use by 75%.

The takeaway: New research is challenging a basic assumption about espresso: that it has to be made with hot water. Instead of relying on near-boiling water, researchers have shown that high-frequency ...

Beginner-friendly, affordable espresso machine: I decided to try a home espresso machine after using my aunt’s $999.95 Breville Barista Touch when I visited her in Texas several months ago. It was ...

Australian researchers say ultrasonic soundwaves can brew strong coffee with room-temperature water and 75% less energy.

Ultrasonic espresso’ made with cold water and high-frequency sound waves uses less energy than the traditional version – and taste tests show it’s just as good.