Earth is a ball that is over 12,000 kilometres in diameter, and if it were modelled into an object the size of a billiard ball, with all its surface unevenness reproduced exactly to scale, the model would be smoother than an ordinary billiard ball—and the ocean would be an all but unnoticeable mist of dampness over 70 percent of its surface.
What It Means
This is a placeholder explanation generated by the low-overhead model. It interprets "Earth is a ball that is over 12,000 kilometres in diameter, and if it were modelled into an object the size of a billiard ball, with all its surface unevenness reproduced exactly to scale, the model would be smoother than an ordinary billiard ball—and the ocean would be an all but unnoticeable mist of dampness over 70 percent of its surface." in the context of "Exploring the Earth and the Cosmos (1982), p. 85" to mean that wisdom is timeless.
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