I am a mathematician and I would like to stand on your roof

From the fascinating site TED, a talk by ethnomathematician Ron Eglash.

This is how the TED side describes the talk:

"I am a mathematician, and I would like to stand on your roof." This is how Ron Eglash greeted many African families while researching the intriguing fractal patterns he noticed in villages across the continent. He talks about his work exploring the rigorous fractal math underpinning African architecture, art and even hair braiding.

Here it is.

The TED site is full of very interesting discussions about many topics. Another humourous and insightful talk is by Sir Ken Robinson on schools and creativity. Here that one is.