Another study led by Shanghai-based East China Normal University's Department of Physics, "The Corpus Callosum of Albert Einstein's Brain: Another Clue to His High Intelligence", published in the journal Brain on September 24, 2013, showed a new technique to conduct the study, which is the first to detail Einstein's corpus callosum, the brain's largest bundle of fibers that connects the two cerebral hemispheres and facilitates interhemispheric communication.[25] Einstein's corpus callosum was thicker than those in control groups, possibly indicating better cooperation between the hemispheres. Scientists currently cannot tell how far the unusual features above were innate or how far they were due to Einstein devoting his life to higher thought.