A team of engineers at Stanford University, in new research published in the Journal of Applied Physics Letters, have reported the development of a tiny (millimeter-scale), implantable cardiac device no longer powered by batteries, but rather by radio waves outside the body. It is contained in a cube eight tenths of a millimeter—the size of a pinhead! It is placed 5 centimeters inside the chest on the surface of the heart, a surface once thought impossible for wireless...
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