Fascinating to think of the unfolding of complex systems from DNA to brains and nervous systems to instincts - programs decompressing over many iterations into programs that contain all the functions living things use in the world. And then, looking at the deceptively simple and repetitive structure of the brain, to think that evolution came up with a single program with infinite depth and sophistication to solve whatever gets plugged in.
And then it takes intense dedication and education to replicate one behavior, like walking.