This illusion will drive you mad

Bad Astronomy
The entire universe in blog form
Nov. 5 2010 7:00 AM

This illusion will drive you mad



And if you like that, you'll love these:

Tip o' the Necker chief to Buzzfeed.

Phil Plait writes Slate’s Bad Astronomy blog and is an astronomer, public speaker, science evangelizer, and author of Death From the Skies!  

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