Hope these questions will rock you too to give me some answers! why does the earth's inside get cooler but its surface get hotter ? (hot because radiation/heat from the sun) and the polar caps are getting melt as reported due to green house effects etc, which doesn't seem logical to me...I am very new to earth science, plz bear with my ignorance. Living in a hot place is terrible but how could species on early earth live next to vocanoes ? This question I know is about adaptation, thick skins those big animals possess to survive generation to generation. And when the earth's cooler, their skins get thinner along with smaller bodies to be covered or the skin would be like a small vinyl bag holding something too big, right ?