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Smart football invented
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BRITISH military scientists have invented a "smart football" that tells the player when it is inflated to the right pressure, the weekly magazine New Scientist reports in this Saturday's issue.
The ball has a patch in its surface in which two films are separated by an opaque gel.
The top film is transparent, while the lower one is embossed with a diamond and a cross, with the cross standing more proud than the diamond.
If the ball is under-inflated, the gel spreads thickly and neither cross nor diamond is visible.
When the pressure is right, the cross alone touches the top film and becomes visible. But if the ball is over-inflated, both the diamond and the cross are visible.
The Defence Evaluation and Research Agency (DERA) -- the "skunk works" where British military engineers devise and test new weapons -- has filed a patent for the device.(SD-Agencies)
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