Stretchy supercapacitors power wearable electronics

A future of soft robots that wash your dishes or smart T-shirts that power your cell phone may depend on the development of stretchy power sources. But traditional batteries are thick and rigid—not ideal properties for ...

No warrant needed to get cell phone location: US court

Police don't need a warrant to obtain mobile phone location data for a criminal investigation, a US appeals court ruled Tuesday in a case closely watched for digital-era privacy implications.

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