100 Insane Facts About Narwhals — The Unicorns of the Arctic Sea

They were sold to European kings as unicorn horns worth more than castles. But the truth about the narwhal is stranger than any myth. In this deep dive, we uncover 100 mind-bending facts about the most mysterious whale on Earth — a creature that dives a mile straight down, hunts in total darkness using sound, and carries a nine-foot spiraled tooth packed with ten million nerve endings. From the medieval "unicorn horn" trade to the confirmed narwhal-beluga hybrid known as the "narluga," from heart rates that drop to three beats per minute in the deep to the questions science still can't answer, this is the complete story of the unicorn of the sea. Why is the tusk almost always the left tooth? How do narwhals survive under solid ice for months in near-total darkness? And how many truly remain in our rapidly warming Arctic? Watch to the end to find out.