Here’s what you’ll learn when you read this story: Theoretical physicists believe math shows the possibilities of a fourth dimension, but there’s no actual evidence—yet. Albert Einstein believed space ...

The fourth dimension isn’t something we can perceive, but it can still be an important tool for physicists. Scientists from the University of Missouri used a 4D “synthetic dimension” to develop a ...

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Mathematicians say knots cannot exist in four-dimensional space. (Image: Canva) Knots cannot exist in four-dimensional space, say mathematicians. In 4D, any knot can be untied without cutting the rope ...