Life is fragile: it thrives only in a narrow range of temperatures between freezing and boiling. How lucky that our planet is just the right distance from the sun: a little farther, and the death of the perpetual Antarctic winter – or worse – would prevail; a little closer, and the surface would truly fry anything that touched it.

Life is fragile: it thrives only in a narrow range of temperatures between freezing and boiling. How lucky that our planet is just the right distance from the sun: a little farther, and the death of the perpetual Antarctic winter – or worse – would prevail; a little closer, and the surface would truly fry anything that touched it.

– Leonard Susskind –

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