In this episode, Dan leads you through the fascinating world of cells, beginning with the origins of cellular life on Earth. He explores the emergence of Earth's first basic cells which established the foundation for all current life forms. Through simple explanations, Dan describes cellular components and their functions.

Mechanobiology is the primary focus of this episode as an emerging scientific discipline that examines how cells respond to external physical forces such as pressure and stretching. Dan explains how scientists replicate physical forces in order to observe how cells respond to stretching and compression.

Dan also answers a question many people who exercise may have asked: Does stretching make your muscles longer according to recent research and understanding? He reviews current scientific studies to clarify widespread misconceptions about stretching while detailing its effects on the human body.