Gadgets

New 3D Printer Draws in Midair Like Magic

Lasers and metal were part of 3D printing for decades before the machines became affordable for personal use. But researchers at Harvard are demonstrating a new technique by which 3D metal structures can be printed in midair, without the need for anything supporting them. If you’re not familiar with the process, 3D printers slowly build […]

Gadgets

This Microwave Oven Is the Size of a Thermos

There’s a reason the microwave oven in your kitchen is a heavy brick: it uses a magnetron and vacuum tube technology that dates back to World War II. But since then, microwave technologies have been vastly improved (see cellphone towers) and a company called Wayv in the UK is finally using them to shrink the […]