How brass instruments work - Al Cannon

source: TED-Ed     2015年4月7日
View full lesson: http://ed.ted.com/lessons/how-brass-i...
What gives the trumpet its clarion ring and the tuba its gut shaking oompah-pah? And what makes the trombone so jazzy? Al Cannon shows how these answers lie not in the brass the instruments are made of, but in the journey that air takes from the musician’s lungs to the instrument’s bell.
Lesson by Al Cannon, animation by TED-Ed.

Eye vs. camera - Michael Mauser

source: TED-Ed      2015年4月6日
View full lesson: http://ed.ted.com/lessons/eye-vs-came...
Your eyes don’t always capture the world exactly as a video camera would. But the eyes are remarkably efficient organs, the result of hundreds of millions of years of coevolution with our brains. Michael Mauser outlines the similarities and differences between your eye and a video camera.
Lesson by Michael Mauser, animation by Nick Hilditch.