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A graduate student has helped illuminate a long-suspected connection between addition and multiplication.

People have known about magnets since ancient times, but the physics of ferromagnetism remains a mystery. Now a familiar puzzle is getting physicists closer to the answer.

A science fiction novelist and an internet commenter made breakthroughs on a longstanding problem about the number of ways you can arrange a set of items. What did they discover?

A new proof from the Australian science fiction writer Greg Egan and a 2011 proof anonymously posted online are now being hailed as significant advances on a puzzle mathematicians have been studying for at least 25 years.

How many colors do you need to color an infinite plane so that no points 1 unit apart are the same color?

By making the first progress on the “chromatic number of the plane” problem in over 60 years, an anti-aging pundit has achieved mathematical immortality.

Triangles fit effortlessly together, as do squares. When it comes to pentagons, what gives?

Federico Ardila opens up about his journey as a mathematician, teacher, Colombian transplant, DJ and creator of mathematical spaces.

A California housewife who in the 1970s discovered four new types of tessellating pentagons is dead at 94.