“Why do you think the giraffe has a long neck?” says the naturalist Philip Henry Gosse to his son Edmund while he tucks him up into bed. “Does it have a long neck so that it can eat the leaves at the top of the tree? Or does it eat the leaves at the top of the tree because it has a long neck?”
“Does it matter?” says Edmund.
“A great deal, my son.”
This exc…
