If you're christian, one. If you're naturalist, I've heard from one, ours, to a multiverse with infinite. One particularly strange theory is that there are infinite 'brane worlds' in a string. That theory came from string theory, to m theory, which also states there are eleven dimensions. Many of the worlds greatest minds can't explain it properly.
The Many Worlds Theory is a hypothesis in quantum mechanics that suggests there are multiple parallel universes that exist simultaneously. According to this theory, every possible outcome of a quantum event is realized in a separate universe. While this theory is not proven, it is a way to interpret certain aspects of quantum mechanics and is a topic of ongoing research and debate among physicists.
Simon Saunders has written: 'Many worlds?' -- subject(s): Quantum theory
many worlds
There are 159 worlds including the 4 dutch worlds
there are 16 worlds. 8 normal worlds and 8 special worlds
The Many Worlds of Andre Norton has 208 pages.
four worlds
The Many Worlds of Andre Norton was created in 1974.
Many Worlds Are Born Tonight was created in 1998.
there are 100 worlds
Juggler of Worlds has 352 pages.