[BITList] The train track optical illusion that's bewildering the internet - BBC News

[Michael Feltham]

> http://www.bbc.co.uk/news/blogs-trending-35989211?ns_mchannel=email&ns_source=inxmail_newsletter&ns_campaign=news_magazine_080416 <http://www.bbc.co.uk/news/blogs-trending-35989211?ns_mchannel=email&ns_source=inxmail_newsletter&ns_campaign=news_magazine_080416>
> 
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