Pathologist Dr. Bennet Omalu is adamant about bringing transparency to the topic of brain damage in football players who suffer multiple concussions. His audience, however, is more concerned about how Dr. Omalu's work will affect the business of football.

To illustrate why excessive use of antibiotics is a problem, a scientist performs an experiment. He drops bacteria into a solution containing a potent, broad-spectrum antibiotic, and they survive.

Dr. Omalu explains how a football player died after a series of repeated hits to the head.

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.

A patient discovers he has a tumor in the true vocal cord