I found this 16min 51sec video lecture to be incredibly fascinating. If you have any passion for Africa and global causes and math I think you'll agree with me.
"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.