Random things which I think are kinda cool, maybe you will too. :^)
Until 1996 the RSA encryption scheme was considered as a munition by the United States government for export purposes.
For a function to be differentiable it must be continuous across it's domain, not all continuous functions are differentiable though, such as the Weierstrass function.
Cloudflare maintains a physical system known as "lavarand" which is used as a part of a number generator for their production machines.
As an artifact from an april fools' joke, The HTTP specification contains the client error response code 418 "I'm a teapot".
SILEX is the only information classified by the United States government while being owned by a private entity, it involves the enrichment of uranium using laser excitation.