Wherever there is a design that is highly successful in a broad range of similar environments, it is apt to emerge again and again, independently – the phenomenon known in biology as convergent evolution. I call these designs good tricks. – Daniel Dennett
The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task, it has a rudimentary nervous system. When it finds its spot and takes root, it doesnt need its brain anymore so it eats it! – Daniel Dennett