按键盘上方向键 ← 或 → 可快速上下翻页，按键盘上的 Enter 键可回到本书目录页，按键盘上方向键 ↑ 可回到本页顶部！
————未阅读完？加入书签已便下次继续阅读！
much。 Even so； his fingers touched the butt of his pistol； as if for reassurance。
They came to a stream； muddy banks on both sides Here Levine paused。 He saw clear three…toed footprints in the mud； some of them quite large。 The palm of his own hand； fingers spread wide； fitted easily inside one of the prints； with room to spare。
When he looked up； Diego was crossing himself again。 He held the rifle in his other hand。
They waited at the stream； listening to the gentle gurgle of the water。 Something shiny glinted in the stream； catching his eye。 He bent over； and plucked it out。 It was a piece of glass tubing； roughly the size of a pencil。 One end was broken off。 There were graduated markings along the side。 He realized it was a pipette； of the kind used in laboratories everywhere in the world。 Levine held it up to the light； turning it in his fingers。 It was odd； he thought。 A pipette like this implied …
Levine turned； and caught a glimpse of movement out of the corner of his eye。 Something small and brown； scurrying across the mud of the riverbank。 Something about the size of a rat。
Diego grunted in Surprise； Then it was gone； disappearing in foliage。
Levine moved forward and crouched in the maid by the stream。 He peered at the footprints left by the tiny animal。 The footprints were three…toed； like the tracks of a bird。 He saw more three…toed tracks； including some bigger ones； which were several inches across。
Levine had seen such prints before； in trackways such as the Purgatoire River in Colorado； where the ancient shoreline was now fossilized； the dinosaur tracks frozen in stone。 But these prints were in fresh mud。 And they had been made by living animals。
Sitting on his haunches； Levine heard a soft squeak ing from somewhere to his right。 Looking over； he saw the ferns moving slightly。
He stayed very still； waiting。
After a moment； a small animal peeked out from among the fronds。 It appeared to be the size of a mouse； it had smooth； hairless skin and large eyes mounted high on its tiny head。 It was greenish…brown in color； and it made a continuous； irritable squeaking sound at Levine； as if to drive him away。 Levine stayed motionless； hardly daring to breathe。
He recognized this creature； of course。 It was a mussaurtis； a tiny prosauropod from the Late Triassic。 Skeletal remains were found only in South America。 It was one of the smallest dinosaurs known。
A dinosaur； he thought。
Even though he had expected I to see them on this island； it was still startling to be confronted by a living； breathing member of the Dinosauria。 Especially one so small。 He could not take his eyes off it。 He was entranced。 After all these years； after all the dusty skeletons … an actual living dinosaur！
The little mussaur ventured farther out from the protection of the fronds。 Now Levine could see that it was longer than he had thought at first。 It was actually about ten centimeters long； with a surprisingly thick tail。 All told； it looked very much like a lizard。 It sat upright； squatting on its hind legs on the frond。 He saw the rib cage moving as the animal breathed。 It waved its tiny forearms in the air at Levine； and squeaked repeatedly。
Slowly； very slowly； Levine extended his hand。
The creature squeaked again； but did not run。 If anything it seemed curious； cocking its head the way very small animals do； as Levine's hand came closer。
Finally Levine's fingers touched the tip of the frond。 The mussaur stood on its hind legs； balancing with its outstretched tail。 Showing no sign of fear； it stepped lightly onto Levine's hand； and stood in the creases of his palm。 He hardly felt the weight； it was so light。 The mussaur walked around； sniffed Levine's fingers。 Levine smiled； charmed。
Then； suddenly； the little creature hissed in annoyance； and jumped off his hand； disappearing into the palms。 Levine blinked； unable to understand why。
Then he smelled a foul odor； and heard a heavy rustling in the bushes on the other side。 There was a soft grunting sound。 More rustling。
For a brief moment； Levine remembered that carnivores in the wild hunted near streambeds； attacking animals when they were vulnerable； bending over to drink。 But the recognition came too late； he heard a terrifying high…pitched cry； and when he turned he saw that Diego was screaming as his body was hauled away； into the bushes。 Diego struggled； the bushes shook fiercely； Levine caught a glimpse of a single large foot； its middle toe bearing a short curving claw。 Then the foot pulled back。 The bushes continued to shake。
Suddenly； the forest erupted in frightening animal roars all around him。 He glimpsed a large animal charging him。 Richard Levine turned and fled； feeling the adrenaline surge of pure panic； not knowing where to go； knowing only that it was hopeless。 He felt a heavy weight suddenly tear at his backpack； forcing him to his knees in the mud； and he realized in that moment that despite all his planning； despite all his clever deductions； things had gone terribly wrong； and he was about to die。
School
〃When we consider mass extinction from a meteor impact；〃 Richard Levine said； 〃we must ask several questions。 First； are there any impact craters on our planet larger than nineteen miles in diameter…which is the smallest size necessary to cause a worldwide extinction event？ And second； do any craters match in time a known extinction？ It turns out there are a dozen craters this large around the world； of which five coincide with known extinctions。 。
Kelly Curtis yawned in the darkness of her seventh…grade classroom。 Sitting at her desk； she propped her chin on her elbows； and tried to stay awake。 She already knew this stuff。 The TV set in front of the class showed a vast cornfield； seen in an aerial view； the curving outlines faintly visible。 She recognized it as the crater in Manson。 In the darkness； Dr。 Levine's recorded voice said； 〃This is the crater in Manson； Iowa； dating from sixty…five million years ago； just when dinosaurs became extinct。 But was this the meteor that killed the dinosaurs？〃
No； Kelly thought； yawning。 Probably the Yucatán peninsula。 Manson was too small。
We now think this crater is too small；〃 Dr。 Levine said aloud。 〃We believe it was too small by an order of magnitude； and the current candidate is the crater near Mérida； in the Yucatán。 It seems difficult to imagine； but the impact emptied the entire Gulf of Mexico； causing two…thousand…foot…high tidal waves to wash over the land。 It must have been incredible。 But there are disputes about this crater； too； particularly concerning the meaning of the cenote ring structure； and the differential death rates of phytoplankton in ocean deposits。 That may sound plicated； but don't worry about it for now。 We'll go into it in more detail next time。 So； that's it for today。〃
The lights came up。 Their teacher； Mrs。 Menzies； stepped to the front of the class and turned off the puter which had been running the display； and the lecture。
〃Well；〃 she said； 〃I'm glad Dr。 Levine gave us this recording。 He told me he might not be back in time for today's lecture； but he'll be with us