Thunder in the void

by Henry Kuttner

Late in the Twentieth Century Man, for the first time, burst through the invisible barrier that had always kept him chained to his planet. A new and almost uncharted ocean lay before him, its vastness illimitable, its mysteries as yet unexplored. Magellan, Columbus, Leif Ericsson—these primitives expected great wonders as the searoads opened before the prows of their ships.