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What is a parallel universe to ours?

What is a parallel universe to ours?
Abbey Phillips from Stockton on Tees (Aged 5-14)

Is it possible for there to be a parallel universe?
Isaac Bradshaw Down from Somerset (Age: 5-14)

Why can’t we get to parallel worlds? And what are they?
Poppy and Tilly from Hertfordshire (age 5-14)

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One Response

  1. An interesting question!

    Imagine you are an ant living on a piece of string. You can only move forwards and backwards, and have no concept of up, down or sideways. You are unaware of any dimensions other than the one you are living in.

    We live in three dimensions (four if you include time), and similarly struggle to imagine any dimensions beyond our experiences. We are just like the ant – other dimensions could exist, but we could not detect them!

    Outside the piece of string could be a whole three-dimensional world, or the string could be wrapped around a tube, or tied in any number of complex knots, but the ant only knows backwards and forwards, and not the three-dimensional world we live in around it.

    Similarly, there may be extra dimensions (up to 26! – according to some phycicists and mathemeticians) in our world, that we just can’t detect. Wrapped up in these dimensions could be other universes that we can’t detect.

    But what if the ant fell off the string? Or we fell into another dimension? Or something or someone fell out of another dimension into ours (this would be equivalent to the ant falling from our world onto a piece of string!)

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