line, 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.'