http://adf.ly/1SZdI2, http://adf.ly/1XIsTW, http://www.ctvviet.com, http://www.nhac24.com <br />Today's show begins with an update on the U.S. presidential race, a shift in generational demographics, and a virus outbreak that threatens to impact the commencement ceremony at Harvard University. We're explaining what exactly mumps is and what causes the disease, and we're exploring how the invention of the elevator dramatically changed the skylines of cities around the world.
