Security

China facial-recognition case puts Big Brother on trial

Facial-recognition technology has become embedded in China, from airports to hotels, e-commerce sites and even public toilets, but a law professor had enough when asked to scan his face at a safari park.

Energy & Green Tech

How do lithium-ion batteries work?

The smartphone era is only just over a decade old, but the pocket-sized computers at the heart of that societal transformation are only really possible because of another technology: lithium-ion batteries.

Engineering

A high-speed motor for satellites

A dizzying 150,000 revolutions per minute: researchers from ETH Zurich (Department of Information Technology and Electrical Engineering) and the ETH spin-off Celeroton have developed an ultra-fast magnetically levitated electric ...

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