Martin, 53

Earned a PhD from the University of Chicago and is the director of the NeuroImaging Centre at University College London and Birkbeck College in England.

Paul, 51

Got his PhD in geology at Columbia University and is now a University of Chicago paleontologist.

Joan, 50

Went to Brown University for her PhD and studies neurological bases of language as professor of linguistics at the University of Kansas.

Margaret, 49

Also has a PhD from Brown and is associate professor at the University of Oregon's Institute of Neuroscience.

Anne, 47

Earned a PhD from Harvard University and is associate professor in the Department of Neurobiology & Anatomy at the University of Texas Medical School.

Sara, 45

Got her PhD at University of Massachusetts Amherst and now investigates the cognitive neuroscience of reading at the University of Glasgow in Scotland.