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Narwhal Tusk

Top of Mind with Julie Rose
  • Apr 6, 2021
  • 17:21
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A tree’s rings show the history of that tree and what conditions were like for it from year to year. The same goes for the tusk of a narwhal. The unicorn-like horns on these whales are telling the story of climate change in the Arctic. Rune Dietz is a professor of marine mammal research at Aarhus University in Denmark. Show More...