Does the earth have a sister planet on another wave length we cannot see?

This si a very flexible question, if you are referring to a situation like the television show "Sliders" then probably, in fact this is the driving force behind the large Hadron Collider, to try and detect if there are any other possible dimensional universes.
Modern thought on the subject says that there are more than likely alternate universes, with alternate Earths, although these universes are probably very like our own , some may be exact opposites, and some may be incredibly alien to our way of thought, perhaps some where there hasnt been a big bang or something like that.
If yu are interested in this subject i suggest reading about string theory, reading steven hawkings books, and investigating quantum physics.

Just as another tidbit, earth did have a sister planet before it was fully formed, it was called Thea, that planet crashed into Earth and made it bigger and I believe the extra debris is what eventually formed into the moon. So technically earth has a twin, but that twin is part of it. People also refer to Venus as Earth's twin because they have, relatively, the same size and mass.

	god -  4827 pts -  (3 years ago)
	There's another theory on the moon that suggests the Earth is older than what we know, and something from further out hit it and liquefied the surface while sending out the bits that would form the moon. This would have happened after the thea collision.

No the earth does not have a sister planet.

There are unfounded wild stories about all kinds of unproveable, unscientific junk. Anything that someone can make up can be put forth as a scientific theory these days. And that is fine. The problem comes in when these fairytales are passed off as fact supported by a real scientific method. And many of them are.

Just because someone presents their theory (guess) in a talk, writes a book, publishes an article doesn't make it true. Even if they use credible concrete terminology like fact, confirmed, substantiated, etc...

Can y'all tell me a answer