The dress
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Dress debate: Why we saw it differently - in 45 seconds

A debate has raged on social media over the colour of a dress which looks different to different people.

In a particular photo, it can appear to be white and gold or blue and black.

The BBC's David Sillito - with the help of professor John Barbur - explains why we saw it differently, in 45 seconds.

  • 28 Feb 2015
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