Richard Wilson, The Sons of Japheth (1956)
“ There in the sky was a new thing, a spacecraft like his, yet unlike it. It looked deadlier, more purposeful. Ignoring him, it was diving out of the unknowable future to destroy its own past.He watched in professional admiration as his fellow pilot screamed unerringly for the Ark in sacrificial completion of the mission he himself had failed to accomplish. Death to the animals, too—from an animal pilot.He knew then that Earth would not die. It might circle lifeless for eons, waiting to welcome the foot—or paw, or tentacle—of others from outside. ”
