If Boston Dynamic's $75,000 robot dog, Spot, is too rich for you, how about a stripped-down consumer version? The Chinese robotics company Unitree's latest robot dog is the Unitree Go 2, which starts at an incredible $1,600.

In 2019, Boston Dynamics made Spot available for lease, and announced plans to manufacture a thousand units per year. The company's goal is to offer Spot, or even packs of them, to inspect industrial sites, carry out hazardous missions, and make deliveries. In 2020, the robot went on sale with a price tag of $74,500.

First-generation robots are a simple mechanical arm that has the ability to make precise motions at high speed. They need constant supervision by a human operator.

Early robots Invented by W. H. Richards, the robot's frame consisted of an aluminium body of armour with eleven electromagnets and one motor powered by a twelve-volt power source. The robot could move its hands and head and could be controlled through remote control or voice control.