Dawkins discusses our limitations in perceiving and contemplating the micro and macro realms outside of our "middle world" in his 2005 TED talk entitled "Queerer than we can suppose: the strangeness of science". He again uses the term later in his 2006 book, The God Delusion, writing, "...the way we see the world, and the reason why we find some things intuitively easy to grasp and others hard, is that our brains themselves are evolved organs : on-board computers, evolved to help us survive in a world — I shall use the name Middle World — where the objects that mattered to our survival were neither very large nor very small; a world where things either stood still or moved slowly compared with the speed of light; and where the very improbable could be safely treated as impossible."