Bringing new meaning to the words "critical mass"
In the language of physics, "critical mass" refers to the smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.
In socio-dynamic terms, "critical mass" is used to describe a sufficiency of momentum whereby conditions become self-sustaining.
In the United States Senate in January of 2010, "critical Mass" is the state that's having a special election today to determine who will occupy the seat held by the late Ted Kennedy.
Elizabeth Wynne Johnson reports...