Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. “The sea, once it casts its spell, holds one in its net of wonder ...

Consider this sequence of numbers: 5, 7, 9. Can you spot the pattern? Here’s another with the same pattern: 15, 19, 23. One more: 232, 235, 238. “Three equally spaced things,” says Raghu Meka, a ...