Saint Carl Sagan demonstrates a mind-bending explanation on how third-dimensional creatures interact with fourth-dimensional creatures. For decades, scientists and mathematicians have conceptualized a fourth dimension and some theorists share there may be other dimensions as well.

In Madeleine L’Engle’s A Wrinkle in Time, the four-dimensional “hypercube” called the tesseract was mentioned. According to L’Engle’s, the tesseract has the power to bend space-time. In this 7-minute video, Carl Sagan goes deeper into explaining how fourth dimension in a way that many people can understand. He explains that dimensionality expands from a two-dimensional flatland to a three-dimensional world, which is the world we interact with on the daily and into the concept of a fourth-dimensional world.