"What use would that be against the Earth Giants? There's nothing organic about them, not even bones. Pure protoplasm!" "We could have used it against the Chinese," said Cliff. "Now--" He shrugged his shoulders hopelessly. * * * * * And if explorers had been content to leave the vast unknown Antarctic Continent alone, they would never have taught the imprisoned Giants to cross the great ice barrier. But that crossing had taken place fifteen years ago, and already the mind of man had become accustomed to the grim facts. Who could have dreamed that the supposed table-land was merely a rim of ice-mountains, surrounding a valley twice the size of Europe, so far below sea-level that it was warmed to tropic heat by Earth's interior fires? Or that this valley was peopled with what could best be described as organized protoplasm? Enormous, half-transparent, gelatinous organism, attaining a height of about a hundred feet, and crudely organized into forms not unlike those of men? Half the members of the Rawlins Expedition, which had first entered this valley, had fallen victims to the monsters. Most of the rest had gone raving mad. And the stories of the two who returned, sane, to Buenos Aires, were discredited and scoffed at as those of madmen. But of a second expedition none had survived, and it was the solitary survivor of the third who had confirmed the amazing story. The giant monsters, actuated by some flickering human intelligence, had found their way out of the central valley, where they had subsisted by enfolding their vegetable and small animal prey with pseudopods, that it to say, temporary projections of arms from the gelatinous bulk of their substance. They had floated across the shallow seas between the tip of the Antarctic Continent and Cape Horn, as toy balloons float on water. Then they had spread northward, extending in a wall that reached from the Atlantic to the Andes. And, as they moved, they had devoured all vegetables and animal life in their path. Behind them lay one great bare, absolutely lifeless area. * * * * * How many of them were there? That was the hideous fact that had to be faced. Their numbers could not be counted because, after attaining a height of about a hundred feet, they reproduced by budding! And within a few weeks these buds, in turn, attained their full development. The Argentine Government had sent a force of twenty thousand men against them, armed with cannon, machine-guns, tanks, airplanes, poison gas, and the new death-ray. And in the night, when it was bivouacking, after what it had thought was glorious victory, it had been overwhelmed _and eaten_!