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

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.

The NFL wants Dr. Omalu to retract the statements that he said about football killing Mike Webster.

Phil demonstrates buoyancy using different types of fluids and different objects. He defines fluids and explains why air and solids such as sand can both be fluids.

Bianca Piper, a high school senior, tells her crush that she likes him, only to learn that he recently got back together with his girlfriend. When his girlfriend sees her, she threatens to release a video about her. Bianca stands up to her and gives her an empowering speech on self-image.