What is cancer, and how does it start? Find out how genetics play a role, which types of cancer are the most prevalent, and what is being done to fight this deadly disease.

Homer Hickam is accused of starting a fire by his teacher. He solves a kinematic free fall equation to prove his innocence.

This clip highlights some of Marie Curie's greatest contributions to science: the theory of radioactivity and the discovery of radium.

Maria and her family are enjoying a vacation on the resort when a tsunami suddenly bursts through. It destroys the resort and takes many lives, including Maria's family.

The Eds try to join Sarah and Jimmy's Rich Club, to which they're denied due to the lack of an invitation. Several other kids are accepted into the club, despite having no invitations, including Kevin, who isn't even dressed appropriately for the club. Sarah and Jimmy use terms to indicate that they view themselves as superior to commoners, such as the Eds.