Is there a four-dimensional space in the world?

There are four dimensions in the world.

Four-dimensional space-time is the lowest dimension that constitutes the real world, and our world happens to be four-dimensional. As for the high-dimensional real space, at least we can't perceive it, just like people pick up a piece of food in front of ants, and ants just think it disappears out of thin air.

There are various multidimensional spaces in mathematics, but so far, the physical world we know is only four-dimensional, that is, three-dimensional space (real world) plus one-dimensional time. The high-dimensional space mentioned in modern microphysics is another meaning, which only has mathematical significance.

Expanding the four-dimensional space of data is a concept of time and space. Simply put, any four-dimensional space can be called "four-dimensional space". But the "four-dimensional space" mentioned in daily life mostly refers to the concept of "four-dimensional space-time" mentioned by Einstein in his general relativity and special relativity.

According to Einstein's concept, our universe is made up of time and space. The relationship between time and space is to add a time axis to the three axes of length, width and height of ordinary three-dimensional space, and this time axis is an imaginary axis.

References:

Baidu encyclopedia-four-dimensional space-time