Usman Khan

What Is a Dimension? The Answer Will Bend Your Mind

Caltech physicist Sean Carroll explains dimensions in ways that even a 5-year-old can understand.   ONE OF MY favorite books as a child was called Flatland: A Romance of Many Dimensions. Written by a grade-school teacher in 1884, it’s a novel narrated by a square who lives in a two-dimensional world, called Flatland, populated by lines and …

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