A lot of games share something in common — they include the use of a ball. But what is it about the shape of a sphere that fascinates humans and animals? That is what a new documentary called Bounce hopes to discover. Traveling across the world and looking back in time, we are shown how the ball has always played a role in many competitive games and remains a staple in sports. Take a look at the trailer above, to the film that looks at the evolutionary breakthroughs, how games have helped us socialize, and much more.