Hot and Cold Reversed - Where should the line be drawn to prevent making the Earth uninhabitable?

In our universe, the energy of the sun generates heat and light. This helps keep the earth warm enough for life and drives much of the earth's climate. Warmth slowly bleeds off into the coldness of space.

In another universe, the energy of the sun generates cold and light. This helps keep the earth cool enough for life and drives much of the earth's climate. The cold slowly bleeds off into the warmth of space. Fires are a source of cold, and are necessary to make it through a hot winter night in some regions.

A pure reversal of hot and cold would basically be just a swapping of lables (it would just be as if our senses of heat and cold were swapped) - That is not what I am aiming for. At some point I need to keep some reactions the same as our universe, to end up with overall a vastly different world than the one we know.

How or Where should I draw this line (or change physics in another way), so that the physics of the universe doesn't cause the earth to be uninhabitable, and to achieve the interesting overall effects of a "cold" sun and needing fire to keep "cool", along with the general temperature changes you'd expect such as freezing along the equator and burning hot areas at the poles?

posted about 9 years ago

DoubleDouble‭

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