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succumbed to the cold； like Captain Robert Falcon Scott and his party； who'd frozen to death on their return trip after trekking to the South Pole。 Others had bee lost and wandered aimlessly before they died。 Many were killed in aircraft crashes and other unfortunate accidents。
Pitt wasn't in the mood to expire； certainly not yet not if he and Giordino were to stop the Wolfs from launching a frightful horror on mankind。 Besides manhandling the Snow Cruiser over the ice shelf； his first order of business was to get to the mining facility as quickly as possible。 His handheld GPS was of no use。 The geographic display on Pitt's unit was incapable of showing his exact position within a thousand miles of the pole。 Because the satellites that relayed the position belonged to the military； who had not planned on conducting a war in Antarctica； they were not in orbit over that part of the globe。
He called down to Giordino； who was standing below and behind him； hunched over a chart table studying a map of the Ross Ice Shelf 〃How about giving me a heading？〃
〃Just keep the front end of this geriatric antique aimed toward the highest peak of those mountains dead ahead。 And； oh yes； be sure to keep the sea on your left。〃
〃Keep the sea on my left；〃 Pitt repeated in exasperation。
〃Well； we certainly don't want to run off the edge and drown； do we？〃
〃What if the weather closes in and we can't see？〃
〃You want a heading；〃 Giordino said cynically。 〃Pick any pass direction you want。 You've got three hundred and sixty choices。〃
〃I stand chastised；〃 Pitt said wearily。 〃My mind was elsewhere。 I'd forgotten that all pass readings down here point north。〃
〃You'll never get on Jeopardy。〃
〃Most of the category questions are beyond my meager mental capacity anyway。〃 He turned to Giordino and made a shifty grin。 〃I'll bet you tell bloody horror bedtime stories to little children。〃
Giordino looked at Pitt； trying to decipher his meaning。 〃I what？〃
〃The cliffs at the edge of the Ross Ice Shelf reach two hundred feet above and nine hundred feet below the surface of the sea。 From the top edge to the sea is a sheer drop。 We drive off the ledge； there won't be enough left of us to sail anywhere。〃
〃You have a point；〃 Giordino grudgingly conceded。
〃Besides falling into a bottomless crevasse or being lost and freezing to death in a blizzard； our only other dilemma is if the ice we're driving on breaks loose or calves and carries us out to sea。 Then all we'll be able to do is sit and wait for a cataclysmic tidal wave launched by the polar shift to sweep us away。〃
〃You should talk；〃 Giordino said； his voice heavy with sarcasm。 〃Your bedtime stories make mine sound like Mother Goose science fiction tales。〃
〃The skies are darkening；〃 Pitt said； staring upward through the windshield。
〃Do you still think we can make it in time？〃 asked Giordino。
Pitt glanced down at the odometer。 〃We've e twenty…one miles in the last hour。 Barring unforeseen delays； we should be there in just less than two hours。〃
They had to make it in time。 If the special assault team failed； then he and Giordino were the only hope； as inadequate for the job as any two men seemed。 Pitt did not bask in an aura of optimism。 He well knew the terrain ahead was fraught with obstacles。 His biggest fears were rotting ice and crevasses seen too late。 If he wasn't constantly alert； he could drive the Snow Cruiser into a deep crevasse and send it plunging hundreds of feet into the Antarctic Sea below。 So far； the frozen wasteland lay fairly flat。 Except for thousands of ripples and ruts like those found in a farmer's plowed field； the ride was reasonably smooth。 Occasionally； he'd spot a crevasse hiding in the ice ahead。 After a quick stop to appraise the situation； he'd find a way to detour around it。
The thought that he was driving a thirty…five…ton lethargic monster of steel across an icy plain with deep fissures looming unseen in every direction was not forting。 Few words in a dictionary could describe the feeling。 Suddenly； a crack in the ice became visible； but only after he vas almost on top of it。 With a hard twist of the wheel； he dewed the Snow Cruiser around sideways； stopping it within five feet of the edge。 After driving parallel to the chasm for half a mile； he finally found a firm surface five hundred yards from where it vanished in the ice。
He glanced at the speedometer and noted that the speed had slowly crept up to twenty…four miles an hour。 Giordino； down in the engine room； was fussing with the two big diesel engines； delicately adjusting the valves on the fuel intake pumps and increasing the flow。 Because Earth's air is thinner at the poles due to a faster rate of spin； and because it is extremely dry and cold； the fuel ratio needed to be reset； a chore Dad and his crew had not yet performed。 Fuel injection was constant on newer diesel engines； but on the sixty…year…old Cummins； the fuel flow to the injectors could be altered。
The frozen desert ahead was bleak； desolate and menacing； while at the same time a landscape of beauty and magnificence。 It could be tranquil one moment and frightening the next。 In Pitt's mind； it suddenly became frightening。 His feet stomped the brake and clutch of the Snow Cruiser； and he watched stunned as a crevasse no more than a hundred feet away opened and spread apart； the crack stretching as far as he could see in both directions across the ice pack。
Dropping down the ladder from the control cabin； he threw open the entry door； stepped outside； and walked to the edge of the crevasse。 It was a terrifying sight。 The color of the ice on the sides that fell out of sight turned from white at the edge of a beautiful silver…green。 Its gap spanned almost twenty feet。 He turned as he heard the crunch of Giordino's feet behind him。
〃What now？〃 questioned Giordino。 〃This thing must run forever。〃
〃Frank Cash mentioned that the wheels could retract to cross crevasse。 Let's check out the operation manual that Dad gave us。〃
As Dad had told them； the Snow Cruiser's designer； Thomas Poulter； had e up with an ingenious solution for the crevasse problem。 The underside of the cruiser's belly was flat like a ski； with a front and rear overhang of eighteen feet on both ends from the wheels。 Following the instructions in the manual； Pitt pressed the levers that retracted the front wheels vertically until they were level with the body。 Then； using the rear wheels for traction； he drove the Cruiser slowly forward until the front section slid across the crevasse and rolled past the opposite edge a safe distance for stability。 Next Pitt extended the front wheels and retracted the wheels in the rear。 Now using the front…wheel drive； the rear half of the cruiser was pulled the rest of the way over the chasm。 After； extending the rear wheels； they were on their way again。
〃I do believe I'd call that a brilliant innovation；〃 Giordino said admiringly。
Pitt shifted gears and turned the bow of the Snow Cruiser back toward the peak that had expanded into a range of mountains。 〃Amazing how he could be fars