The Beauty of Pi

Maths is a beautiful thing, but between operations that beauty is lost. It would be so much more fun for students that are struggling with this subject if they did something artistic once in a while, just to relieve the stress. I found this video some time ago that caught my attention explaining pi's beauty in the best way I could've thought. Enjoy!

Dog years?

So, I got a new puppy some days ago. This got me wondering about dog years, since dogs age and die faster than humans that means that the concept of  "dog years" really exists, but: How to calculate it? Just googleing it is boring.
I found this page that shows really clearly how to calculate dog years: 
Figure out Dog Years

Happy Valenine's Day!!

"FOILing"

Here's a cool way of "FOILing" I've never seen before! Very cool! https://www.youtube.com/watch?v=aNReoaONJdg