“Man is a creature adapted for life under circumstances which are very narrowly limited. A few degrees of temperature more or less, a slight variation in the composition of air, the precise suitability of food, makes all the difference between health and sickness; between life and death.” MenNatureDifferencesEnvironmentAirCircumstancesCreaturesDegreesSicknessLife And DeathCompositionPreciseTemperatureVariationAdaptedBetween Life And Death Book:The Story of the Heavens Source: The Story of the Heavens
