Here’s a delightful fun fact for you: a group of bears is called a sleuth! Can you sleuth out the dog hiding among these polar bears? Challenge yourself with this puzzle from Canine Cottages, a travel website for dog-friendly properties.

If you’ve ever wondered why you can’t seem to get enough of these frustrating games, scientists have an answer. It’s all about the challenge, computer scientist Paul Schrater told Scientific American. According to Schrater, humans are inherently goal-seeking. The process of working toward a goal may be unenjoyable or even downright irritating, but the satisfaction of achieving a goal—and subsequently being able to release it—more than makes up for the frustration.

© Canine Cottages

But if you want to get even faster at finding hidden objects in images, there are some strategies you can use. Family Games Guide recommends that you follow your first instincts when searching for out-of-place oddities. Some researchers have even gone so far as to create algorithms that map out the best searching strategies. Where’s Waldo, one of the most famous hidden object search games, has been the subject of several of these experiments. According to one experiment, you should check first in the bottom left part of the image and then move to the bottom right if you haven’t found Waldo by then. But does that strategy hold up for non-Waldo-related search games? You be the judge.

© Provided by Mental Floss A hidden image of a dog in a group of bears

Did you find the dog yet? How about now? On average, it’s taken people two minutes and 49 seconds to find it. When you’re ready to see the answer, scroll down.