NASA's Aura satellite can measure air quality across the entire planet in just 24 hours. This episode describes some of Aura's achievements, explains how smog is formed, and discusses the future of Earth's ozone hole.
This episode explains the science behind calories and nutrition facts labels. Find out how scientists first determined the calorie content of food in the 1800s, and how fat, protein and carbohydrate levels on nutrition facts labels are found today.
Graphene, a material created from sheets of carbon that are one-atom-thick, has unique properties that could lead to amazing applications, such as a coffee cup that streams the day’s headlines in real time, a cooking pot that can detect the presence of E. coli bacteria, or a television screen that is as flexible and thin as a piece of paper.
People can be uptight about the sounds and odors that come from the human body, but understanding the science behind what may appear gross may make these things a little less gross. In Part 1 of this two-part video, we discuss what causes bad breath.
People can be uptight about the sounds and odors that come from the human body, but understanding the science behind what may appear gross may make these things a little less gross. In Part 2 of this two-part video, we explain how acne forms and how to treat it.
In this episode, we explain how wastewater goes from polluted to pure. To get more acquainted with this process, we visited Washington, D.C.'s Blue Plains Advanced Wastewater Treatment Plant, which treats a whopping 370 million gallons of sewage a day!