A lunar rover that will explore the moon on foot in 2021 was unveiled in London on Thursday.

The new concept, with four legs rather than wheels, will send data back to a larger mother ship, which will transmit it back to Earth.

U.K. startup Spacebit signed a contract with U.S. space robotics company Astrobotic to get the rover on board their Peregrine lander, which will carry 14 NASA instruments to the moon.