writing with a pencil than a collection of molecules bound together in a temporarily stable solid form. That's makes Radiolab so fascinating - it brings to light common ways in which the lazy or over-simplified ways we perceive the world and actual reality disagree. Sadly, none of the examples given in the show has anything to do with locality (except for the sun example). When talking about locality one must talk about the speed by which a signal can travel through a system. For the examples of the tank ammunition and the arrow, the shockwave of the impact would travel through the projectile at the speed of sound in that projectile, in the case of the arrow that's at approximately 10 times faster than the speed of the arrow, which means that the back of the arrow knows about the impact much before it reaches the target. In ballistics this is a good thing, what you want is all the momentum in the projectile to hit the target at a small surface during a short time for maximum impact, you don't want many mini-impacts from each segment of the projectile. When it comes to the slinky, some commentators have got it almost right. Again, the information travels much faster than any other scale in the system, in this case it's the information about the decreased tention in the slinky. What happens is that the tention in the slinky, T, is a function of its length l: T(l). If you think