We can't understand when we're pregnant, or when our siblings are expecting, how profound it is to have a shared history with a younger generation: blood, genes, humor. It means we were actually here, on Earth, for a time - like the Egyptians with their pyramids, only with children.
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One hardly knows where, in the history of science, to look for an important movement that had its effective start in so pure and simple an accident as that which led to the building of the great Washington telescope, and went on to the discovery of the satellites of Mars.
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