Like a mirror image of Bedford's Law, mathematicians have found a pattern in prime numbers that raises more questions than it answers. Share on Facebook (opens in a new window) Share on X (opens in a ...

We recently had a rainy weekend interrupt our original plans to go geocaching. Instead, I took inspiration from John Baichtel's recent posting - Codes For Kids - to introduce my kids to ciphers.

In Part I, you broke a simple cipher. Now try creating a more complex cipher. Cut out the NOVA Decoder Ring and NOVA Cipher Code Ring and the window marked INDEX. You are now going to put this simple ...