There is no number more metal than six hundred and sixty-six. Thirteen does its best, but there’s something intrinsically metal about 666. It might be the repetition, or it might be that Iron Maiden ...

We normally look to the Bible for morals, religious inspiration, and history. But are you excited to learn that there’s some mathematics in there, too? If you’re a nerd like me, the answer is yes.

Ah, Friday the 13th. A day of superstition, bad luck and careful avoidance of black cats and broken mirrors. Well, in some cultures, anyway. Though 13 has a long but foggy history of association with ...