We notice the movement of automobiles and beings in the street, but we do not notice that the earth turns. We believe that automobiles go at a great speed on a fixed ground; yet the speed of the earth's rotation at the equator is 40,000 km every 24 hours. (Alexander Calder)

We notice the movement of automobiles and beings in the street, but we do not notice that the earth turns. We believe that automobiles go at a great speed on a fixed ground; yet the speed of the earth's rotation at the equator is 40,000 km every 24 hours.

Alexander Calder

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