Do you see the human face here?

From the Scientific American:

Coffee Face
Our face-detection neural machinery can be overloaded. There’s a man’s face hidden in this image. But before we spill the beans about its location, look around and see if you can find it yourself. It’s difficult! Don’t give up too quickly: finding the face may take you a few minutes the first time you look. But once you have seen it, you will always find it immediately in every subsequent search.

You don't find the human face among the coffee beans?  Click here for the clue, and for lot more discussions on illusions and neuroscience. (HT)