Thanks to its adjustable design it can easily be adjusted both in length and in height to any user's size from adults to children.

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Also under consideration is a proposal to raise the height of the wall spanning the length of the inner harbor.

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Unlike the familiar three of length, breadth and height, these extra dimensions are curled up so tightly that they elude detection (though scientists are trying to prise them open in particle accelerators like the Large Hadron Collider near Geneva).

ECONOMIST: Cosmology