Think!" cried the Professor. "This prodigious bowl was filled with ice to a depth of three hundred feet. And when we and our children are dead, seeds will have sprouted in the silt, and a young forest will nod over these stones. Here before you is one scene of a geological drama, past and future implicit in the present you perceive, and all within the span of a single human generation, and a human memory.
( Oliver Sacks )
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