Science: In her Life and Career column, Vijaysree Venkatraman looks at what could be a growing and welcome trend: male scientists taking more time off work to look after their children. Scientists tend to have freer working arrangements than other workers, which favors fathers’ greater involvement in child care. On the other hand, science is a competitive field. Some male scientists worry about the impact to their careers if they become stay-at-home dads. Women scientists continue to cite child care as one of the most time-consuming and unequally shared household responsibilities.