Is there an infinity of infinities? The question sounds almost absurd, like a child’s riddle meant to twist your brain into ...

Mathematicians have discovered a new infinity, one that is so strange that it could change how we understand logic, numbers ...

Martin Kruskal, a mathematician at Rutgers university in New Jersey, has two brothers, both of whom are also mathematicians. When my older brother’s oldest child was five, Kruskal recalls, he argued ...