Justin Clarke tugged his gloves under the sleeves<br >of his heavy blue parka. Then he shielded his eyes<br >with one hand and searched all around. "I don t<br >see Dad，" he told his sister， Marissa. "Do you?"<br > "I can t see anything!" Marissa cried， shouting<br >over the wind. "All I can see is ice!"<br > The sled dogs barked and shook themselves，<br >eager to start moving again.<br > Justin narrowed his eyes， squinting to the right，<br >then the left. The ice stretched smooth and shiny，<br >silvery under the bright sunlight.<br > In the distance， it darkened to blue. Darker.<br >Darker. Until the blue ice appeared to melt into<br >the sky. Justin couldn t see where the ice ended<br >and the sky began.<br > "It s cold，" Marissa murmured. A sharp gust of<br >wind blew the parka hood off her red hair. She<br >instantly reached up with both gloved hands and<br >pulled it back in place.<br > Justin rubbed his stub of a nose. He pressed his<br >"