Scientists have created robots that have rib cages, flexible spines, and can SWEAT

A team of researchers at the University of Tokyo developed a pair of humanoid robots that can carry out a wide range of life-like activities -- such as doing push ups, sit ups, and stretches as well as playing badminton and other complicated motions -- in a less mechanical manner compared with most automatons. The robots, called Kengoro and Kenshiro, were designed in such a way that mimics the human body's muscular and skeletal systems. Kenshiro was developed between 2011 and 2014, while Kengoro was developed from 2015 onward. "For at least the last two millennia, human beings have endeavored to understand the systems and mechanisms that make up the human body. However, a limitation of conventional humanoids is that they have been designed on the basis of the theories of conventional engineering, mechanics, electronics, and informatics," lead researcher Yuki Asano told Daily Mail online. The scientists used aluminum, steel, and plastic as a frame for the humanoid robots.