A spherical world, closed but continually expanding, is a new playground for thought.


The Expanding Universe, Chapter III, Section I (p. 66), The University Press. Cambridge. 1933


A spherical world, closed but continually expanding, is a new playground for thought.

A spherical world, closed but continually expanding, is a new playground for thought.

A spherical world, closed but continually expanding, is a new playground for thought.

A spherical world, closed but continually expanding, is a new playground for thought.