Engineering

Desktop 3-D printing in metal or ceramics

These spur gears—seen here with a euro cent coin for scale—have been produced in stainless steel to a space standard of quality using nothing more than an off-the-shelf desktop 3-D printer.

Telecom

Italy's 5G stumbles after a shining start

Italy's 5G project, launched to great fanfare in October 2018 with frequencies going for top dollar at auction, has since fallen victim to sky-high costs and red tape.

Internet

Mobile access won't fix the digital divide

Mobile services have had an important and positive impact on developing countries where they are the main means of connecting to the internet. However, mobile services have capacity constraints. They use limited radio frequency ...

Energy & Green Tech

Bio-based chemicals could reduce fossil fuel use

Petrochemicals, the oil- and gas-derived compounds that serve as the molecular backbones for much of modern commerce, commanded a $539.3 billion market value in 2018.