You are currently previewing the NEW Scientific American site. Tell us what you think or view the old site

Skip to main content


The Hidden Brain

Flashy neurons may get the attention, but a class of cells called glia are behind most of the brain's work—and many of its diseases

By R. Douglas Fields

10 Top Illusions

Balls that roll uphill, bathtubs that stretch and shrink, freaky faces and throbbing hearts. Welcome to the year's best visual tricks

By Susana Martinez-Conde and Stephen L. Macknik


Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format

Give a Gift & Get a Gift - Free!

Give a 1 year subscription as low as $9.99