Marijn Heule turns mathematical statements into something like Sudoku puzzles, then has computers go to work on them. His ...

Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

This famous Buddhist temple, dating from the 8th and 9th centuries, is located in central Java. It was built in three tiers: a pyramidal base with five concentric square terraces, the trunk of a cone ...