The simple beauty of mathematics. Möbius transformations.

All over town in Las Vegas, there are little metal boxes along the sidewalks. In other cities, these would dispense your run-of-the-mill newspapers. In Las Vegas, many of them dispense advertisements for adult entertainment. Naked women with stars or hearts covering strategic portions of their anatomy sell their wares. It is Sin City after all. We wear our vices on our sleeves for all the world to see.

While waiting at a red light that morning, I glanced over at a mother walking down the sidewalk holding her daughter’s hand. The girl was probably only four years old. When they came to some of those notorious boxes, the little girl’s eyes went wide as she stared at something that I couldn’t see. She kept her eyes glued to that something as they walked past. I had a pretty good idea what she saw.

I had a newborn daughter of my own. It struck me that my little girl would probably see those same things as she got older. It broke my heart to realize what that little girl was learning and what my daughter had ahead of her.

When I saw the following video from Dove’s Campaign for Real Beauty (the same people who brought us evolution), I immediately remembered that little girl on the sidewalk.