Three engines would each drive three fans that are smaller and thus easier to quieten than current ones.

ECONOMIST: Green aircraft

NASA, America's aerospace agency, showed how to quieten the boom by using a fatter wing on a modified fighter plane.

ECONOMIST: Air travel

But to survive in this sizzling heat, relieve the pressure and quieten the aggressive crowd, soccer insiders say England must find a way to possess the ball for long periods.

WSJ: High Hopes on Rooney's Return