The Health Based Tutorials

Unhealthy lifestyles have brought on a social epidemic of "diabesity," says author Mark Hyman, and community-driven solutions may be the only way out.

Sometimes, against a uniform, bright background such as a clear sky or a blank computer screen, you might see things floating across your field of vision. What are these moving objects, and how are you seeing them? Michael Mauser explains the visual phenomenon that is floaters. Eye floaters are called muscae volitantes, Latin for “hovering flies". Floaters are visible because of the shadows they cast on the retina. View full lesson: http://ed.ted.com/lessons/what-are-those-floaty-things-in-your-eye-michael-mauser Related reading: Your Eyes: Understanding Flashes and Floaters - Cleveland Clinic http://buff.ly/1zNgIr8

From TED-Ed: We hear anywhere from 10 to 200 lies a day. And although we’ve spent much of our history coming up with ways to detect these lies by tracking physiological changes in their tellers, these methods have proved unreliable. Is there a more direct approach? Noah Zandan uses some famous examples of lying to illustrate how we might use communications science to analyze the lies themselves. Lesson by Noah Zandan, animation by The Moving Company Animation Studio. View full lesson: http://ed.ted.com/lessons/the-language-of-lying-noah-zandan

The highly virulent Ebola virus has seen a few major outbreaks since it first appeared in 1976 -- with the worst epidemic occurring in 2014. How does the virus spread, and what exactly does it do to the body? Alex Gendler details what Ebola is and why it's so hard to study. Lesson by Alex Gendler, animation by Andrew Foerster. View full lesson: http://ed.ted.com/lessons/what-we-know-and-don-t-know-about-ebola-alex-gendler

How do the lungs work? TED-Ed video When you breathe, you transport oxygen to the body’s cells to keep them working, while also clearing your system of the carbon dioxide that this work generates. How do we accomplish this crucial and complex task without even thinking about it? Emma Bryce takes us into the lungs to investigate how they help keep us alive. Lesson by Emma Bryce, animation by Andrew Zimbelman for The Foreign Correspondents' Club. Read the full lesson here: http://ed.ted.com/lessons/what-do-the-lungs-do-emma-bryce What does the liver do? There’s a factory inside you that weighs about 1.4 kilograms and runs for 24 hours a day. It’s your liver: the heaviest organ in your body, which simultaneously acts as a storehouse, a manufacturing hub, and a processing plant. Emma Bryce gives a crash course on the liver and how it helps keep us alive. Lesson by Emma Bryce, animation by Andrew Zimbelman for The Foreign Correspondents' Club.

Would mathematics exist if people didn't? Did we create mathematical concepts to help us understand the world around us, or is math the native language of the universe itself? Jeff Dekofsky traces some famous arguments in this ancient and hotly debated question.