claim: Fifty-five thousand years ago the whole world was 2°C warmer than it is today[ ... ]
evidence: Research using sediment in lakes near the Okstind Glacier has shown that the summer climate in Nordland was up to 2.5 °C warmer 9,000 to 6,000 years ago, and then slowly cooled—it was 0.5 °C warmer 2,000 years before present ( see Holocene climatic optimum. ).