The Hadza of Tanzania, a remote group of hunter-gatherers, showed a stronger preference for symmetry than people in the United Kingdom.

CNN: Beholding beauty: How it's been studied

You record and then upload, Hadza produces the page all for free.

FORBES: Launch Festival's First 6 companies give show a strong start.

And 4th up is Hadza.com, a South American company, allows you to see multiple user-generated videos from a concert, social events or sporting event on one screen.

FORBES: Launch Festival's First 6 companies give show a strong start.

And Hadza women like symmetry in men's faces even more when they were pregnant or nursing, periods when they may be extra cautious about foods and disease harmful to a child.

CNN: Beholding beauty: How it's been studied