Narwhal TuskTop of Mind with Julie Rose • Season 1, Episode 1571, Segment 5
Apr 6, 2021 • 18m
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.
