Three women, three men.

"Two women scientists, living hundreds of years apart, explore the meaning of love. motherhood, family, art, and science in this contemporary comedy. Legacy of Light juxtaposes the story of Emilie du Chatelet, a mathematician, scientist, and lover of the great eighteenth-century philosopher Voltaire, who became unexpectedly pregnant at forty-two, and that of a twenty-first-century physicist desperately trying to conceive a child."-- back cover.