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Horses and humans don't see the world in the same way. Whilst the human eye can see a full range of colours, horses only see in a pallet of blues and yellows.

According to new research from the University of Exeter, that means they are unable to see orange - the traditional colour of most fences and hurdles in horse racing.

The finding has prompted horse racing organisations to consider whether they should break with tradition, by painting fences a colour that horses can see more easily.

(Image: The sun reflected in a horses eye. Credit: Alan Crowhurst/Getty Images)