Recent scientific discussions suggest that the fourth dimension might be concealed within our everyday perception of reality, ...

A new book offers mathematical puzzles, such as fitting a coin through a hole that seems too small to accommodate it Things to Make and Do in the Fourth Dimension: A Mathematician's Journey through ...

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 ...

Cosmos: Carl Sagan: The 4th Dimension In this scene from the classic “Cosmos” series, Carl Sagan imagines what happens when a three-dimensional character enters a two-dimensional world. FQXi: Taking ...

Michelle Starr is CNET's science editor, and she hopes to get you as enthralled with the wonders of the universe as she is. When she's not daydreaming about flying through space, she's daydreaming ...