before the blinding white light of Mercury Sunside Donovan looked at the instruments on his wrist. The temperature is eighty centigrade!' He stared out over the broken, rocky ground. "See anything?
"There's a dark area over there that may be the selenium pool. But I don't see Speedy
Donovan stood up on his robot's shoulders. "I think... Yes, there he is. He's coming this way!
"I see him!' shouted Powell. "Let's go!
The robots began to move.
"Faster shouted Donovan.
No use cried Powell. "These robots can move at only one speed.
They moved out from the shadow of the cliff, and the sunlight poured down white-hot around them.
Keep your eyes on Speedy, Mike, Powell said.
"It's going to get hotter."
Robot SPD-13 ran easily across the broken ground. SPD robots were the fastest robots produced by the United States Robots Company. They were built for the low gravity, the fierce temperatures and the broken ground of Mercury.
Speedy!, shouted Powell into his radio. "Come here!' Speedy looked up and saw them. He stopped suddenly and remained standing for a moment. Then he turned and ran away, kicking up dust behind him. Over their radios, Donovan and Powell heard him singing a song.
Donovan said weakly, "Greg, he's crazy
"He's not crazy,' Powell said. "A robot's only a robot. There's something wrong with him that's confusing his brain patterns. Once we find out what it is, then we can fix it.