I have a friend who often admonishes people to hold their beliefs lightly. Our perceptions can be distorted by habit, framing, context, etc.  I like to think that with concentration and awareness, I can see what is. And so, this color illusion drives me nuts!  The problem? The “green” and “blue” spirals are actually the same color…

Colored spirals - not quite what it appears

Hat Tip: Bad Astronomy, TED Blog, James Cascio, (…nerds run in packs?)