ROGER  PENROSE

                    Sir Roger Penrose is widely considered one of the most important mathematical physicists of our time. His work on the properties of black holes, along with Stephen Hawking's, revolutionized our understanding of the nature of the universe.

WORKS OF PENROSE: 

                In the 1960s, working with Stephen Hawking, Penrose was able to prove that all matter within a black hole collapses into a single point, aka a singularity. According to Encyclopedia Britannica, this is "a geometric point in space where mass is compressed to infinite density and zero volume."
               Mass is so concentrated at this point of space that even light photons are unable to escape the black hole's maw.

 PENROSE  TRIANGLE:

                      In the 1950s Penrose, with his father, devised the Penrose triangle or impossible triangle/tribar.  Interestingly, the optical illusions appear to have first been developed by Oscar Reutersvärd in the 1930s. He was a Swedish graphic artist who has come to be known as the "father of the impossible figure".