What made Einstein Einstein? With access to rare medical slides and photographs of the great scientist’s brain, researchers seek out the biological roots of genius in Einstein’s brain. What might Einstein’s brain have in common with young math whizzes today? How does the anatomy of David Pogue’s brain measure up to one of the greatest brains of all time? And can we discern whether peculiarities in Einstein’s brain are gifts of nature, fruits of nurture, or both?