Get full access to Outside Learn, our online education hub featuring in-depth fitness, nutrition, and adventure courses and more than 2,000 instructional videos when you sign up for Outside+ Sign up for Outside+ today.
Horns or antlers? That’s the question when it comes to the prairie-loving pronghorn antelope. The black, forked protrusions are found on males and females, and stay attached their entire lives, just like horns. But, like an antler, the outer keratin fiber that covers the bone drops off each year. Plus, a true horn is never forked. The moral: Human rules can’t predict nature’s forms.