This optical illusion has had thousands of people baffled.
There's supposed to be a dog somewhere near the cat and the lady. But why is it so hard to find?
The challenge: Find the dog in 7 seconds
As with many optical illusions, the image seems quite clear at first. A cat is sitting on their owner's lap, while she reads a book.
But once you know there's also a dog in there, everything becomes much more confusing.
There clearly isn't another pet sitting with the lady, so where is he?
It's all in the detail
If you managed to find the dog in under 7 seconds, congratulations.
And if you need a little bit of extra help, we'll give you a clue...
Take a look at the detail of the wall behind the lady and the cat. Upside down, and hiding in plain sight, you'll see the outline of a dog.
As with all optical illusions, it seems obvious once you know where to look:
