"Yeah? Who?"
"Mrs. Mimms. She babysits with me when Mom and Dad go out. She's been all over in space. Venus and all them other planets. She says there ain't any monsters on any of 'em. There ain't nuthin on Mars except a little bitty grass and a lot of scientists from Earth."
"Mad scientists?" asked Captain Taylor hopefully.
"Nah, just scientists. She says we oughta forget about monsters and play the right way. You know, like with atomic reactors and radar communication and growing new kinds of food for Earth colonies."
"Ah I don't believe it. She'd hafta be from someplace in the future. She'd hafta come here by time machine or something, wouldn't she?"
"That's what she did," Lt. Smith informed the captain. "She showed me pictures to prove it. Pictures of her last vacation on the moon. You oughta see what they done to the place. She's from the future, all right."
"Then she ain't supposed to tell anybody about it, is she?"
Lt. Smith waved his hand airily. "She says it's OK to tell kids because grownups wouldn't believe it anyway. Get your mother to let her sit for you next time. She'll show you the pictures if you ask her. Heck, it's no fun playing monsters now."
"Well, look," said Captain Taylor magnanimously, "supposing I let you be Captain today. You can pretend any kind of stuff you want."
"OK," said the new Captain, and immediately postulated a gigantic atomic reactor on the planet Pluto.