Description

Go different planets is just a truth, and with overpopulation extending the resources of Planet, the need to locate habitable worlds keeps growing ever-more immediate. Without any time to hold back decades for conversation between slower-than-light spaceships and house, an unlikely solution -- human telepathy is explored by the Long Range Foundation. Similar twins Tom and Pat are recruited to become the radios that'll keep consitently the boats in touch with Planet, but one of these needs to remain behind as the other examines the depths of space.This is among Heinlein's triumphs.