Bowhead whales, the giants of the Arctic, are using the Northwest Passage to move across the top of the Americas. Skeletons, DNA samples and harpoon heads have all suggested that bowhead populations living on each side of the continent did meet and mingle.
The Times Atlas of the World exaggerated the rate of Greenland's ice loss in its thirteenth edition last week, scientists said on Monday.
Ice loss from Antarctica and Greenland has accelerated over the last 20 years, research shows, and will soon become the biggest driver of sea level rise. From satellite data and climate models, scientists calculate that the two polar ice sheets are losing enough ice to raise sea levels by 1.3mm each year.