The blog is misbehaving this morning and wouldn’t present the animation correctly, so you’ll have to jump over to this page on the main site.
In a class last weekend, we were discussing perceptions and right brain / left brain things, and someone said something about “that dancer image”. A few people knew what they were talking about - I guess it’s been emailed around the block a few times - but many of us didn’t. So, we found an unused browser and fired it up…
The question you’ll need to ask is “Which way is the dancer turning?” Clockwise? Anti-Clockwise? Then follow the link for the whole article.