When Will We Run Out Of Names?

source: Vsauce      2015年4月13日
Vsauce is nominated for a Webby in Science & Education! You can support learning online by voting for Vsauce or any of the FANTASTIC nominees here:http://pv.webbyawards.com/2015/online...

What's the difference between accuracy and precision? - Matt Anticole

source: TED-Ed     2015年4月14日
View full lesson: http://ed.ted.com/lessons/what-s-the-...
When we measure things, most people are only worried about how accurate, or how close to the actual value, they are. Looking at the process of measurement more carefully, you will see that there is another important consideration: precision. Matt Anticole explains what exactly precision is and how can help us to measure things better.
Lesson by Matt Anticole, animation by Anton Bogaty.

Why is biodiversity so important? - Kim Preshoff

source: TED-Ed     2015年4月20日
View full lesson: http://ed.ted.com/lessons/why-is-biod...
Our planet’s diverse, thriving ecosystems may seem like permanent fixtures, but they’re actually vulnerable to collapse. Jungles can become deserts, and reefs can become lifeless rocks. What makes one ecosystem strong and another weak in the face of change? Kim Preshoff details why the answer, to a large extent, is biodiversity.
Lesson by Kim Preshoff, animation by TED-Ed.

How to spot a counterfeit bill - Tien Nguyen

source: TED-Ed     2015年4月16日
View full lesson: http://ed.ted.com/lessons/how-to-spot...
Authentic dollar bills are equipped with many security features to make them difficult to forge. But that doesn’t stop counterfeiters from trying to fool people with fakes. Luckily, anyone can help catch a counterfeit; all you need are a few simple tools and a bit of chemistry. Tien Nguyen details the chemistry behind counterfeit cash.
Lesson by Tien Nguyen, animation by Lippy.

Why are manhole covers round? - Marc Chamberland

source: TED-Ed     2015年4月13日
View full lesson: http://ed.ted.com/lessons/why-are-man...
Why are most manhole covers round? Sure it makes them easy to roll, and slide into place in any alignment. But there’s another, more compelling reason, involving a peculiar geometric property of circles and other shapes. Marc Chamberland explains curves of constant width and Barbier’s theorem.
Lesson by Marc Chamberland, animation by Pew36 Animation Studios.

The science of static electricity - Anuradha Bhagwat

source: TED-Ed     2015年4月9日
View full lesson: http://ed.ted.com/lessons/the-science...
We’ve all had the experience: you’re walking across a soft carpet, you reach for the doorknob and … ZAP. But what causes this trademark jolt of static electricity? Anuradha Bhagwat sheds light on the phenomenon by examining the nature of matter.
Lesson by Anuradha Bhagwat, animation by Artrake Studio.