All That Ice Melted in a Few Thousand Years. Nobody Can Explain Where the Heat Came From.

The last great ice age terminated in a geological instant - trillions of tons of ice melting away within a few thousand years. Randall’s challenge is direct and pointed. Where did the thermal energy come from to drive that transformation at that speed? There is no consensus answer. The mechanisms that trigger the onset of an ice age and those that bring about its termination remain scientifically unresolved - competing theories exist, but no framework has achieved the kind of broad agreement that would qualify as settled science.

That gap matters enormously to Randall because of what is claimed in its absence. If the scientific community cannot reach consensus on what causes ice ages to begin or end - processes that have reshaped this planet repeatedly within the human timeline - then the assertion that climate science is settled becomes extremely difficult to defend. Randall is not dismissing the study of climate. He is pointing at a fundamental inconsistency - that the most dramatic climate events in Earth's recent geological history remain without agreed explanation, while certainty is simultaneously claimed about the mechanisms driving change today. The thermal energy that ended the last ice age is still unaccounted for. That is not a minor footnote. It is a problem at the center of the entire conversation.