Scientists at the Georgia Institute of Technology have created a robot named DURUS that can walk a lot like a human, and with the swagger of one with a lot of confidence.
Aaron Ames, associate professor of automation and mechatronics says that the process is a lot more complicated than one would expect. Getting the robot to have a natural human swagger requires some intense work.
“In terms of equations, these things are insane. If you were to write them down, we would have thousands of pages of equations that underline this basic motion of the robot,” Ames said. 
However, research into the creation of robots that appear like humans has shown that bipedalism is actually fairly ineffective, despite the fact that we humans rely on it. Robots are much more likely to stay steady and not fall over if they have multiple legs or operate on wheels.
So while a multi-legged robot might function better than that of a two-legged robot, the robots themselves are designed to mimic humans in order to respond in disaster scenarios at home and on the battlefield. They must walk on two legs in order to squeeze into tight spaces to perform a rescue. Also, having more than two legs or operating on wheels can make it impossible for a robot to navigate stairs, which might render it useless in many scenarios.
One of the biggest pitfalls of the robot at the moment is that once it falls, it is unable to get back up again. This would make it extremely difficult to use it in a genuine disaster scenario. However, scientists are currently working on remedying this problem.
Anna Scanlon is an author of YA and historical fiction and a PhD student at the University of Leicester where she is finishing her degree in modern history.