SciShow
Life as a Sea Cow
The sea cow, or manatee, is a gentle giant. The video focuses on this herbivore and its unique traits. Did you know they regrow teeth or that some have toenails on their flippers? They face challenges like a limited amount of fat to stay...
Crash Course
Digestive System (Part 1)
The stomach can hold 1.5 liters of food, which remains there for two to three hours in order for digestion to complete. The 33rd video in a series of 47 covers the process of digestion. Classes learn why digestion occurs, about the...