I first read “A Wrinkle in Time” in 5th grade. I don’t remember how much I understood, but I lay at the feet of Madeleine L’Engle my later ability to wrap my mind around theoretical math and space-time relationships despite an almost paralyzing dislike of manipulating numbers.

In tribute to L’Engle’s death over the weekend, NPR put together an amazing explanation of what physicists refer to as a four dimensional cube – a tesseract.

Mind-blowing.