Life on our planet depends upon having a climate that changes within narrow limits - not too hot for the oceans to boil away nor too cold for the planet to freeze over.
Paleoclimatology is the science of understanding and explaining those variations, those limits, and the forces that contr.
We live with variation, but a variation with limits.
Over the past billion years Earth\'s average temperature has stayed close to 14-15 C, oscillating between warm greenhouse states and cold icehouse states.
Life on our planet depends upon having a climate that changes within narrow limits - not too hot for the oceans to boil away nor too cold for the planet to freeze over