Column
- Math
Fermat’s Natural Spirals
Using points to trace out spirals produces intriguing secondary patterns.
- Math
Primes, Palindromes, and Pyramids
Prime numbers that have the same sequence of digits whether read forward or backward can be built into pyramids.
- Math
Knotted Strings and Inca Accounts
Researchers are starting to untangle mysterious Inca messages encoded in knotted strings.
- Math
Strange Orbits
Orbiting bodies can follow weird trajectories, from figure-eight loops to complex, interlocked paths.
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