Engineers have created a new kind of stretchy electronic patch that could one day be used to wirelessly monitor everything from breathing to brain and heart activity. The scientists stacked four layers of flexible circuit boards, with tiny connections between each, and filled them with conductive materials. The “smart bandage” has the ability to record eyeball movements, respiration, and body motion — depending on where it's applied — and can relay that information to a phone or laptop nearby.
Learn more: Three-dimensional integrated stretchable electronics