Sometimes they look at the earth and could be tempted to roll back all they know to be true, and to believe instead that it sits, this planet, at the centre of everything. It seems so spectacular, so dignified and regal. They could still be led to believe that God himself had dropped it there, at the very centre of the waltzing universe, and they could forget all those truths men and women had uncovered (via a jerking and stuttering path of discovery followed by denial followed by discovery followed by cover-up) that the earth is a piddling speck at the centre of nothing. They could think: no
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