An international team of marine scientists, led by the University of Groningen in the Netherlands and the Center for Coastal Studies in the USA, has studied the DNA of family groups from four different whale species to estimate their mutation rates. Using the newly determined rates, the group found that the number of humpback whales in the North Atlantic before whaling was 86 percent lower than earlier studies suggested.
We talk with glaciologist Sofia Ribeiro and marine biologist Mads Peter Heide-Jørgensen about the changes underway as global warming overwhelms Greenland. Our guest in our 'Ocean Favourite' segment is endurance swimmer Lewis Pugh.
Clarifying chaos of narwhal behavior miragenews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from miragenews.com Daily Mail and Mail on Sunday newspapers.