Hyperspace summary

How many dimensions are there?

We tend to think of the universe as being three-dimensional. There are three spatial dimensions – length, width, and breadth. Counting time as a dimension, there are four in total.

However, some theoretical physicists believe there may actually be ten dimensions. 

That might sound incredible – impossible to imagine, let alone believe. And indeed, for many years, the notion of higher dimensions seemed to be the stuff of science fiction. 

But these days, many physicists are intrigued by the theory of hyperspace. Put simply, even if we aren’t yet able to perceive them, other dimensions probably exist.

But  you’re probably wondering why physicists are looking for additional dimensions in the first place. Aren’t three or four enough?

Well, not really. Many scientists believe that the known dimensions aren’t enough to adequately describe the forces in our universe. 

The laws of nature, such as light and gravity, are expressed with greater simplicity and elegance in higher dimensions – their natural element.

Here’s a helpful analogy.

Imagine a cheetah – a sleek, elegant animal that can run at incredible speeds. In its natural habitat – the African savannah – it’s a truly magnificent creature.

Now, imagine that cheetah in a cage. In this setting, it may now seem less awe-inspiring, and even rather sad – it’s reduced, somehow. The cheetah is like the laws of physics – impressive in its natural habitat, but much less so in a different setting.

At the moment, we’re only capable of measuring the laws of physics in three dimensions. But ideally, we should be examining these laws in their full glory, in their natural habitat – higher-dimensional space-time, or hyperspace.

For many physicists, the idea of hyperspace is thrilling. It opens up all kinds of possibilities, some of which we’ll explore shortly.

Significantly, hyperspace could also resolve the key challenge of theoretical physics – the quest for unification. 

Everything in our universe can be reduced to four forces – the electromagnetic, the strong nuclear, the weak nuclear, and the gravitational force. The problem is, these forces seem completely dissimilar, or even fragmented.

Starting with Einstein, some of the greatest geniuses of physics have looked for something that would unify the four forces – something to bring them all together.

Could hyperspace be the answer?