Inflating the tube strains the mesh, providing a powerful pulling force.

ECONOMIST: Mechanical hand seeks dangerous, dirty and dull jobs

But exactly what's driving that expansion - the force responsible for pulling the Universe apart, and for want of a better description, dubbed dark energy - remains a mystery.

BBC: Getting the measure of dark energy

Yes there are methods to manually push the installation files onto handsets, to unlock bootloaders, to force updates by pulling out the ethernet cable at the right time, but that is not the point.

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The tractor would intercept the asteroid from just 48m away and exert a small gravitational force on it, pulling the rock towards it.

BBC: British plan to tackle asteroids

France protested by pulling its aircraft out of the force that has been patrolling the no-fly zone over southern Iraq (it had earlier withdrawn from the northern patrol).

ECONOMIST: What next for Iraq? | The

Finally, it might take a shock like pulling out of the World Cup to force England to deal with the thugs.

ECONOMIST: England��s shame

It has at least three factions, and they disagree on many things, so it will have a hard time pulling itself together into a truly cohesive legislative force.

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Wyn Jones, prosecuting, said film taken from the camera showed the defendant pulling up in his car, walk towards the camera, cut four wires and then force it off its holding bracket.

BBC: Mold Law Courts