Salman Khan is very enthusiastic about the topic of cellular respiration! He provides an interesting presentation of the respiration process. Expect to learn about the basic stages of respiration, how it works in the human body, and the...

Carbon is a key element in life on Earth. Where can it be found? Hear all about carbon's whereabouts and how it is used. Climate change is brought up along with human responsibility. This clip is great for a junior high or high school...