The Man Who Rocked the Earth

I thought, too, of the first and most significant realization which the reading of astronomy imposes: that of the exceeding delicacy of the world's position; how, indeed, we are dependent for life, and all that now is, upon the small matter of the tilt of the poles; and that we, as men, are products, as it were, not only of earth's precarious position, but of her more precarious tilt.