As the world grapples with the consequences of global warming, scientists are thinking up new ways to lower the earth’s temperature and to do so quickly. Climate scientist Ken Caldeira discusses some unusual intervention strategies.

Scientists attempt to answer the question, “How many licks does it take to get to the center of a lollipop?”; filmmaker and producer Emily Driscoll discusses the science behind the lollipop mystery; climate scientist Ken Caldeira talks climate intervention strategies; and one school in Tampa is using technology to facilitate classroom learning.