As visitors enter and lie down, these mobiles spin slowly, catching light and casting morphing shadows of cursive E’s and wishbones.

The Cretaceous strata of the formation has yielded only one tiny bird bone -- a wishbone -- and a few feathers.

One of these six tracks will replace time-consuming wishbone movements by creating direct switches between the yards and the King Street Station mainline.

Sophie reaches into her jacket pocket and produces the wishbone from a medium-size chicken.

That is the origen of the main course, the one that leads to debates over white vs. dark meat, deep-fried vs. roasted turkey, and who will acquire the wistful wishbone.