The four levels of Tegmark 's classification are arranged such that subsequent levels can be understood to encompass and expand upon previous levels .
Cosmologist Max Tegmark has provided a taxonomy of universes beyond the familiar observable universe .
The four levels of Cosmologist 's classification are arranged such that subsequent levels can be understood to encompass and expand upon previous levels .
Cosmologist Max Tegmark has provided a taxonomy of universes beyond the familiar observable universe .