Tiny deviations: the new metal detector looks for minute disturbances in Earth’s magnetic field. (Courtesy: iStock/muffinmaker) A compact, low-cost and low-power metal detector that can identify the unique magnetic fingerprints You’ve reached the limit of what you can view on Physics World without registering If you already have an account on Physics World, then please sign in to continue reading If you do not yet have an account, please register so you can Unlock all the content on the site Choose which e-mail newsletters you would like to receive Want to read more? Register to unlock all the content on the site E-mail Address
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