Most of us are familiar with optical illusions. They make our eyes and brains question whether they are seeing things as they truly are or creating our own version of what we see. Similarly, an ...

Discover the science behind the Shepard tone, an auditory illusion that creates the effect of a sound that seems to rise endlessly without actually getting higher. Donald Trump’s approval rating hits ...

A pure 100 hertz tone can sound higher than a tone that contains 150 and 200 hertz frequencies—a contradiction that reveals how the brain constructs pitch. From 64-foot organ pipes that produce ...