Share Radio's tech whizz Steve Caplin tells Simon Rose why Amazon is closing 68 of its stores. For skiers going off-piste there's an autonomous ski lift on tracks or, more scarily, a portable tow rope with a winch. There's a car that can climb gradients greater than 50%, an infinity electric train at an Australian mine, we hear why planes are being covered with shark skin, about the company contracted to mine oxygen on the moon and a tide clock for surfers.
