What if you had to grow 20 pounds of bone on your forehead each year just to find a mate? In a bloody, itchy process, males of the deer family grow a new set of antlers every year, use them to fend off the competition, and lose their impressive crowns when breeding season ends.

From Deep Look, learn about Northern California’s Tule elk and the life cycle of their bone and velvet weapons: How Do Reindeer and Elk Get Their Astounding Antlers?

Follow this with Arctic Cowboys: Hitch a Ride with Reindeer Herders in Finland and what’s the difference between horns and antlers?

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