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The world owes all its onward impulses to men ill at ease; the happy man inevitably confines himself within ancient limits.
A 1% improvement in efficiency could mean the difference between life and death.
All my life through, the new sights of Nature made me rejoice like a child.
I prefer to count the stars rather than to laugh at them.
It may be the cock that crows, but it is the hen that lays the eggs.
Without models, we would be wandering in the dark when it comes to predicting climate change.