Engineering

Sound-powered sensors stand to save millions of batteries

Sensors that monitor infrastructure, such as bridges or buildings, or are used in medical devices, such as prostheses for the deaf, require a constant supply of power. The energy for this usually comes from batteries, which ...

Security

US proposes remote ID requirement for drones

US regulators on Thursday unveiled a proposal to require privately operated drones to use remote identification—a kind of electronic license plate—as part of efforts to ensure airspace safety.

Business

Drone delivery firm Zipline raises $250 mn for expansion

US-based drone operator Zipline, which has seen pandemic-fueled growth of delivery of vaccines and medical supplies in Africa and the United States, said Wednesday it raised $250 million as it moves to expand globally.

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