Look up at the sky for long enough on a partly cloudy afternoon and you will start to see faces. Not vaguely. Actual faces. Eyes, a nose, a mouth, sometimes an expression. The same thing happens with ...

When you look at clouds, tree bark, or the front of a car, do you sometimes see a face staring back at you? That’s “face pareidolia” and it is a perfectly normal illusion where our brains spot faces ...

While circling Mars in 1976, NASA’s Viking 1 spacecraft took pictures of its surface. One image created quite a bit of controversy: It’s impossible not to immediately see the pattern on the image.