and on the ground, the defence advanced research projects agency — or darpa to its friends — showed off relied on an altogether different type of wheel. darpa claimed that the wheels will result in better manoeuvrability. and if you like nothing more than traditionally—made pizza, you might want to look away now. this pizza—making robot can spread the sauce and put the pizza in the oven, and even cut it for you. the company behind the robot says it does not work faster than a human pizzaiolo, but can be more efficient by making several pizzas at the same time. deep in the heart of boston's jungle of cables, something stirs. it is a cheetah. and it is off for a prowl. we are starting to see walking robots like this trotting out of labs all around the world. now the important skill here is not that they can walk a particular route autonomously — they are usually controlled manually using games controllers. no, the amazing skill here is that they can walk and balance as competently as we can, even on the most unforgiving of terrain. ok, that is impressive. that slips, loses its balance, an