Here's a bit of anecdotal evidence (as it only takes one subject into account). http://singularityhub.com/2013/10/13/the-secret-to-einsteins-genius-brain-study-

Here's a bit of anecdotal evidence (as it only takes one subject into account). http://singularityhub.com/2013/10/13/the-secret-to-einsteins-genius-brain-study-notes-unusually-well-connected-hemispheres/ http://singularityhub.com/2013/10/13/the-secret-to-einsteins...