The Apple Watch is the most popular watch, hands down. And it's one of the most popular fitness watches. And for good reason! On the best Apple Watches, one of the most useful features is the heart rate tracker. But it turns out, the heart rate tracker isn't just for humans. Yep, you read that right.
In a recently shared video, a wildlife vet and conservationist demonstrated an offbeat, but ingenious use of Apple's popular gadget. It showed an Apple Watch wrapped around a lion's tongue, tracking the animal's heart rate.
