When did Anaximander first suggest infinite worlds might exist?
Anaximander first suggested that infinite worlds might exist in the sixth century BCE. Historians debate whether he believed these worlds co-existed or appeared in succession.
Questions about Multiverse
Short answers, pulled from the story.
Who organized universes into four distinct levels in his classification scheme?
Cosmologist Max Tegmark organized universes into four distinct levels in his classification scheme. Level I describes an extension of our universe containing infinite Hubble volumes with identical physical laws, while Level IV is the ultimate ensemble considering all universes equally real if describable by mathematical structures.
What evidence did scientists find from the Planck satellite regarding parallel universes?
A more thorough analysis using Planck satellite data did not reveal any statistically significant evidence of such collisions. The Planck satellite has a resolution three times higher than WMAP yet found no gravitational pull from other universes.
Why do skeptics like George Ellis criticize multiverse hypotheses?
George Ellis criticized the concept in August 2011 stating it is not a traditional scientific theory. He emphasized that evidence will likely never be found because the multiverse lies far beyond the cosmological horizon.
How does the weak anthropic principle explain conditions promoting life without intelligent design?
The weak anthropic principle posits we exist in one of the few universes that support life. If many universes exist with different physical laws, some would naturally have parameters suitable for conscious life.