![Block Universe Image source: Harry Foundalis Block Universe Image source: Harry Foundalis](http://www.timeone.ca/wp-content/uploads/2013/03/Block-Universe-e1403878578710.jpg)
Classification: concept
Chapter: A Time for Space
The block universe is the whole of spacetime conceived as a single entity. It shows how different observers moving relative to each other perceive different presents like slices of a spacetime in which past and future all exist, just waiting to be observed.