Stanford University scientists have invented a light-powered bionic eye, which has helped some patients to see.
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An enormous hurricane raging at Saturns north pole has an eye 2,000km (1,250mi) across - big enough to cover the UK 12 times over. The striking images of the storm were snapped from a height of 420.000km (260,000mi) by the Cassini spacecraft, which arrived at Saturn in 2004. They were captured in red and infrared wavelengths and have been false-coloured to show detail. Scientists say the hurricanes winds reach a staggering 150m/s (330mph). But they do not know just how long the sto