The asymmetrical
groove in humans was also known, but the
new study, in which 177 people and 73 chimps had brain scans, revealed it is almost
completely lacking in the other primates (PNAS, DOI: 10.1073 / pnas.1412389112).
This tiny change begets another change and another change, and before you know if, you have pulled yourself out of that rut and created a
new groove that has the potential to
completely shake up your life.