Robotic cheetah that could run faster than Usain Bolt unveiled

A robotic cheetah that can silently run and jump at speed has been showcased in the USA by researchers at the Massachusetts Institute of Technology (MIT) this week.

The mechanical big cat - a four-legged creature comprised of gears, motors and batteries - has been in development for more than a year, but previously had to be plugged in to mains power via a cable.