Hawking uses the concept of Euclidean space-time to describe his theory. Space-time is the idea that time and three-dimensional space are intertwined in a four-dimensional continuum, which can be altered by large objects like planets and black holes (artist's impression)

Classy Art 18 in. "Euclidean Space I" by Tava Luv Framed Printed Wall - The Home Depot

Classy Art 18 in. "Euclidean Space II" by Tava Luv Framed Printed Wall - The Home Depot

Carl Friedrich Gauss (1777-1855). Known as the prince of mathematicians, Gauss made significant contributions to most fields of 19th century mathematics. An obsessive perfectionist, he didn't publish much of his work, preferring to rework and improve theorems first. His revolutionary discovery of non-Euclidean space (that it is mathematically consistent that parallel lines may diverge) was found in his notes after his death. During his analysis of astronomical data