Before revision: Data from even earlier ice-cores going as far back as 800,000 years ago suggest probable cyclicity of interglacial length and an inverse correlation with the maximum temperature of each interglacial, but Ruddiman argues URL that this results from a false alignment of recent insolation maxima with insolation minima from the past, among other irregularities that invalidate the criticism.
After revision: Data from even earlier ice-cores going as far back as 800,000 years ago suggest probable cyclicity of interglacial length and an inverse correlation with the maximum temperature of each interglacial, but Ruddiman argues that this results from a false alignment of recent insolation maxima with insolation minima from the past, among other irregularities that invalidate the criticism.