About the SA Blog Network

Posts Tagged "illusions"

Frontiers for Young Minds

This Box is Heavier; I Can Just Hear it! Illusions of Sight and Sound in the Blind and Deaf


The last time someone told you to look at an optical illusion, they probably described it as playing a cool trick on your eyes. But these quirks of perception – as well as most other illusions – have more to do with tricking your brain than anything else. Rather than thinking about illusions as being [...]

Keep reading »

How Neuroscientists and Magicians Are Conjuring Brain Insights

Mariette DiChristina and Apollo Robbins

“I see you have a watch with a buckle.” Standing at my side, Apollo Robbins held my wrist lightly as he turned my hand over and back. I knew exactly what was coming but I fell for it anyway. “Yes,” I said, trying to keep an eye on him, “that looks pretty easy for you [...]

Keep reading »
Roots of Unity

Your Telephone Is Lying to You About Sounds


Telephones lie about sounds because odd numbers aren’t even. Once again with those integers and sound perception! Telephones can only pick up frequencies above 300 or 400 Hertz (cycles per second, also called Hz), but most adults’ speaking voices are lower than 300 Hz (approximately the D above middle C). And yet every day, people [...]

Keep reading »

More from Scientific American

Email this Article