Add Yahoo as a preferred source to see more of our stories on Google. Of all the elaborate illusions and wall-to-wall effects performed in the stage show "Stranger Things: The First Shadow," the ...

Optical illusions are the latest trend on social media. These brain teasers allow users to engage their brains in a fun manner. The latest challenge to go viral on Reddit asks users to find two kids ...

Your brain is lying to you right now. Not maliciously, and not because something’s wrong with it. It’s doing exactly what evolution designed it to do, making split-second decisions about the world ...