“There’s the Prime Canal,” Randy said, pointing to the largest chasm of all. “It feeds all the little canals in this section.”
“Aren’t those trees growing along the canals?” Jill asked.
Randy nodded. “Evergreens,” he said.
“What’s that white stuff in the bottom of the canals and near the roots of the trees?” Ted wanted to know.
“That’s frost,” Randy answered. “The sun never melts it completely. It never even gets up to zero in this latitude.”
Dr. Kenton, whose interest was beyond Mars at the moment, said, “Look, kids, there’s our comet again!”
He pointed it out to them in the heavens. It was a long streak across the sky. The nucleus burned brightly, like a heavenly torch.
“Now it really looks like a comet!” Ted declared.
“It’s beautiful!” Jill murmured.
“We’ll be able to see it from Mars for several days,” Dr. Kenton told them. “Then it’ll gradually disappear from view.”