The metal detector has received a dolphin-inspired upgrade. A new technique distinguishes electronic gadgets from other metals, potentially aiding first responders and law enforcement agents.
Inspired by the way dolphins hunt fish by lassoing them with strings of bubbles, physicist and engineer Timothy Leighton of the University of Southampton in England builds sonar devices that differentiate between underwater bubbles and objects such as fish and naval mines (SN: 8/25/12, p.
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