FAP, June 20 (FAP)-according to the latest issue of Natural Materials, an international team led by the Massachusetts Institute of Technology has developed a metal-free, jelly-like material that is as soft and tough as biological tissue and conducts electricity like traditional metals. This material can be made into printing ink and may one day become a functional gel-based electrode with the appearance and feel of biological tissue. Researchers say gelatinous electrodes may replace metal to stimulate nerves and connect to the heart, brain and other organs of the body.