Tony Robbin had started out as a painter. He created complex works filled with interwoven patterns and ambiguous figures to give the illusion of seeing more than one object in the same place at the ...

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 ...