article_snippet: The paper, published in the Journal of the Royal Society Interface, details how the team built a small micro-controller, wireless receiver and a rechargeable lithium battery.
article_snippet: These were packaged together in a ‘backpack’ weighing 0.007lbs
article_snippet: In November 2014 researchers from North Carolina fitted the hardy creatures with electrical backpacks complete with tiny microphones to detect the faintest of sounds.