In the illustration: A tesseract (a four-dimensional cube) and the "shadow" it casts on a plane—the quasicrystal discovered by Shechtman. According to Prof. Bartal, "The fact that a quasicrystal is a ...

We inhabit three dimensions, moving through the fourth (time) like a needle on a record, convinced that only the ‘now’ under the needle exists. That’s because we don’t understand that the ‘then’ and ...