“Yes,” he said slowly, “a little sac of blue fluid is inside a golf ball, underneath all the rubber bands.” He forgot what the point of it was. He glanced at the clock. Twelve minutes left. His stomach kicked. He tried to ease all his weight from the tender leg; the puncture in his ankle was stinging as the blood dried. “For a whole day,” he said, “between Tuesday and Wednesday noon, the earth is barren. There is no life on it. Just ugly rocks, stale water, vomiting volcanoes, everything slithering and sliding and maybe freezing now and then as the sun like a dirty old light bulb flickered up there in the sky. By yesterday noon, a little life showed up. Nothing spectacular; just a little bit of slime. All yesterday afternoon, and most of the night, life remained microscopic.” He turned and wrote on the blackboard,

Corycium enigmaticum

Leptothrix

Volvox.

He tapped the first one and the chalk turned to a large warm wet larva in his hand. He dropped it in disgust and the class tittered. Caldwell pronounced, “Corycium enigmaticum. Carbonic remains of this primitive marine organism were found in rocks in Finland believed to be a billion and a half years old. As the name suggests, this primitive form of life remains enigmatic, but it is believed to be a calcareous blue-green algae of the type that still tints large areas of ocean.”

A paper airplane shot into the air, wobbled, and sharply fell; it struck the floor of the middle aisle and became an

open-faced white flower whose baby-like yowling continued throughout the remainder of the class. Pale fluid dropped from its injured leaf and Caldwell mentally apologized to the janitors.

“Leptothrix,” he said, “is a microscopic fleck of life, whose name in Greek means ‘small hair.’ This bacteria could extract from ferric salt a granule of pure iron and, fantastic as it seems, existed in such numbers that it laid down all the deposits of iron ore which man presently mines. The Mesabi Range in Minnesota was originally put there by American citizens of which thousands would fit on a pinhead. Then, to win World War Two, we gouged, all those battleships and tanks and Jeeps and Coke machines out of it and left the poor old Mesabi Range like an old carcass the jackals had chewed. I feel awful about it. When I was a kid in Passaic they used to talk about the Mesabi Range as if she were a beautiful orange-haired lady lying up there by the Lakes.”

Not content with pencil-tickling, Deifendorf had put his hands around the Davis girl’s throat and with his thumbs was caressing the underside of her chin. Her face was growing smaller and smaller in sensual ecstasy. “Third,” Caldwell called-the undercurrent of noise in the class was rising to his lips-”the volvox, of these early citizens in the kingdom of life, interests us because he invented death. There is no reason intrinsic in the plasmic substance why life should ever end. Amoebas never die; and those male sperm cells which enjoy success become the cornerstone of new life that continues beyond the father. But the volvox, a rolling sphere of flagellating algae organized into somatic and reproductive cells, neither plant nor animal-under a microscope it looks just like a Christmas ball-by pioneering this new idea of cooperation, rolled life into the kingdom of certain-as opposed to accidental-death. For-hold tight kids, just seven more minutes of torture-while each cell is potentially immortal, by volunteering for a specialized function within an organized society of cells, it enters a com promised environment. The strain eventually wears it out and kills it. It dies sacrificially, for the good of the whole. These first cells who got tired of sitting around forever in a blue-green scum and said, ‘Let’s get together and make a volvox,’ were the first altruists. The first do-gooders. If I had a hat on, I’d take it off to ‘em.”

He pantomimed doffing his cap and the class screamed. Mark Youngerman jumped up and his acne leaped to the wall; the paint began to burn, blistering in slowly spreading blotches above the side blackboard. Fists, claws, cocked el bows blurred in patch-colored panic above the scarred and varnished desk tops; in the whole mad mass the only still bodies were those of Zimmerman and Iris Osgood. At some point, Zimmerman had slipped across the aisle and sat on the same seat with the girl. He had his arm around her shoulders and beamed forward proudly. Iris in his hug was tranquil and inert, her eyes downcast and her dull cheeks lightly flushed.

Caldwell looked at the clock. Five minutes left, and the main part of the story all before him. “Around three-thirty this morning,” he said, “while you were still asleep in your trundle-beds, all the large phyla except the Chordata appear in advanced form. As far as the fossils tell, it happened like that.” He snapped his fingers. “Up until dawn, the most important animal in the world, spreading on the ocean floor everywhere, was an ugly thing called the trilobite.”

A boy over by the windows had sneaked a paper grocery bag into class and now, nudged by another boy, he tumbled its contents, a clot of living trilobites, onto the floor. Most were just an inch or two long; a few were over a foot in length. They looked like magnified wood lice, only they were reddish. The bigger ones wore on their ruddy cephalic shields partially unrolled condoms, like rubber party hats. As they scuttered among the scrolling iron desk-legs, their brainless heads and swishing glabellae brushed the ankles of girls who squealed and kicked up their feet so high that white thighs and gray underpants flashed. In terror some of the trilobites curled into segmented balls. As a sport the boys began to drop their heavy textbooks on these primitive arthropods; one of the girls, a huge purple parrot feathered with mud, swiftly ducked her head and plucked a small one up. Its little biramous legs fluttered in upside-down protest. She crunched it in her painted beak and methodically chewed.

Caldwell calculated that this late in the game there was nothing to do but ride the rumpus out to the bell. “By seven o’clock this morning,” he explained, and a very few smeared faces seemed to be listening, “the first vertebrate fishes appeared. The Earth’s crust buckled. The oceans of the Ordovician Age dwindled.” Fats Frymoyer leaned over and shoved little Bill Schupp off his seat; the boy, a frail diabetic, fell to the floor with a bump. When he tried to rise, an anonymous hand appeared on his head and pushed him down again. “At seven-thirty, the first plants began to grow on land. In swampy pools, lungfish learned to breathe and drag themselves across the mud. By eight o’clock, the amphibians were here. The earth was warm. There were marshlands in Antarctica. Lush forests of giant ferns rose and fell and laid down the coal deposits of our own state, for which this age is named. So when you say ‘Pennsylvanian,” you can mean either a dumb Dutchman or a stretch of Paleozoic time.”

Betty Jean Schilling had been chewing bubble-gum; now a ping-pong-ball-sized bubble, a triumph, a prodigy, issued from her tongue and lips. Her eyes crossed strenuously and nearly popped themselves in effortful concentration. But the marvelous bubble collapsed, coating her chin with a strip of pink scum.

“Insects appeared and diversified; some dragonflies had thirty-inch wings. The world grew cold again. Some amphibians went back to the sea; others began to lay their eggs on land. These were reptiles, and for two hours, from nine o’clock to eleven o’clock, as the earth grew warm again, they dominated life. Fifty-foot plesiosaurs roamed the sea, pterosaurs flapped through the air like broken umbrellas. On land, gigantic morons made the earth shake.” By prearranged signal all of the boys in the room began to hum. No one’s mouth moved; their eyes shifted here and there innocently; but the air was filled with a hovering honey of insolence. Caldwell could only swim on. “The brontosaurus had a thirty-ton body and a two-ounce brain. The anatosaurus had two thousand teeth. Triceratops had a helmet of frilled bone seven feet long. Tyrannosaurus rex had tiny arms and teeth like six-inch razors and it was elected President. It ate everything-dead meat, living meat, old bones-”