These two amazing animals bring their A game to this closely matched competition. At first glance, they might seem too different to duke it out, but wait--you're in for a surprise! Readers have a ringside seat to view as they battle it out in 22 kooky and quirky categories, like Coolest Hangout, Weirdest Relatives, Best Smile, Biggest Appetite, and so much more. It's up to you to follow the action and decide who's the ultimate winner! A final spread devoted solely to conservation helps further National Geographic's core mission to save the planet. One thing we know for sure: You'll be a shark and sloth expert by the end of this epic showdown!