Eternal Struggle

The cool thing about this is that it's self-balancing - if either side gets larger than the other due to random chance, the ball in that side will have more space to bounce in, and therefore bounce less often, slowing its growth. Meanwhile, the ball in the smaller side will bounce more often in its smaller space, making up the ground.

It seems there is a parallel with physics: two pressurized chambers with equal pressure and a membrane separating them. The odd thing here is that there is only one molecule in each of them.

All models are wrong…