Since they are built on to a flat wafer, rather than etched out of it, layers of vertical transistors could even be constructed on top of one another, raising the intriguing possibility of multi-storey semiconductors.

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There are even a number of vertical deals sites such as wine website Lot18.

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Yeang has even talked in terms of future plans for "vertical farms" where residents could grow and harvest their food from the walls of their homes.

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You can even put harnesses on opera singers and make them walk up vertical walls.

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Full discovered that geckos are able to race up vertical plains so quickly because of millions of tiny hairs containing billions of even tinier split ends on the pads of their feet, which are able to almost instantaneously stick and unstick themselves to surfaces.

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In places, even its primeval marrow juts out: where the river flattens we slide evenly past eerie, vertical folds of Vishnu schist, which our guides tell us whistle when the wind blows through its billion-year-old fins.

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