"The world belongs to people with IQs of 120. Anything much greater or less amounts to a liability."

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If Earth ever suffers a runaway greenhouse effect (like what has happened on Venus), then our atmosphere would trap excess amounts of solar energy, the air temperature would rise, and the oceans would swiftly evaporate into the atmosphere as they sustained a rolling boil. This would be bad.

— Neil deGrasse Tyson