Ars Technica: During the last deglaciation, between roughly 21,000 and 10,000 years ago, there was a rise in atmospheric carbon. This surge brought CO2 levels up to where they were in preindustrial times and contributed to the warming that ended the glacial period. But there's a significant item missing from this picture: we don't know where the carbon came from.
Researchers had suggested that changes in the distribution of ice, driven by alterations in Earth's orbit and tilt, altered the oceans capacity to...