A sign in the yard of a church next door said CHRIST IS THE ANSWER. (The question, of course, is: What do you say when you strike your thumb with a h… - Bill Bryson

If you imagine the 4,500-bilion-odd years of Earth's history compressed into a normal earthly day, then life begins very early, about 4 A.M., with the rise of the first simple, single-celled organisms, but then advances no further for the next sixteen hours. Not until almost 8:30 in the evening, with the day five-sixths over, has Earth anything to show the universe but a restless skin of microbes. Then, finally, the first sea plants appear, followed twenty minutes later by the first jellyfish and the enigmatic Ediacaran fauna first seen by Reginald Sprigg in Australia. At 9:04 P.M. trilobites swim onto the scene, followed more or less immediately by the shapely creatures of the Burgess Shale. Just before 10 P.M. plants begin to pop up on the land. Soon after, with less than two hours left in the day, the first land creatures follow.

Thanks to ten minutes or so of balmy weather, by 10:24 the Earth is covered in the great carboniferous forests whose residues give us all our coal, and the first winged insects are evident. Dinosaurs plod onto the scene just before 11 P.M. and hold sway for about three-quarters of an hour. At twenty-one minutes to midnight they vanish and the age of mammals begins. Humans emerge one minute and seventeen seconds before midnight. The whole of our recorded history, on this scale, would be no more than a few seconds, a single human lifetime barely an instant. Throughout this greatly speeded-up day continents slide about and bang together at a clip that seems positively reckless. Mountains rise and melt away, ocean basins come and go, ice sheets advance and withdraw. And throughout the whole, about three times every minute, somewhere on the planet there is a flash-bulb pop of light marking the impact of a Manson-sized meteor or one even larger. It's a wonder that anything at all can survive in such a pummeled and unsettled environment. In fact, not many things do for long.

I have long known that it is part of God’s plan for me to spend a little time with each of the most stupid people on earth, and Mary Ellen was proof that even in the Appalachian woods I would not be spared. It became evident from the first moment that she was a rarity.

So to sleep on the sleeping porch required preparation. First, you put on long underwear, pajamas, jeans, a sweatshirt, your grandfather’s old cardigan and bathrobe, two pairs of woolen socks on your feet and another on your hands, and a hat with earflaps tied beneath the chin.Then you climbed into bed and were immediately covered with a dozen bed blankets, three horse blankets, all the household overcoats, a canvas tarpaulin, and a piece of old carpet. I’m not sure that they didn’t lay an old wardrobe on top of that, just to hold everything down. It was like sleeping under a dead horse. For the first minute or so it was unimaginably cold, shockingly cold, but gradually your body heat seeped in and you became warm and happy in a way you would not have believed possible only a minute or two before. It was bliss. Or at least it was until you moved a muscle. The warmth, you discovered, extended only to the edge of your skin and not a micron farther. There wasn’t any possibility of shifting positions. If you so much as flexed a finger or bent a knee, it was like plunging them into liquid nitrogen.