This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...

Most physicists doubt that time exists. On this page 40 years ago, we published scientific ‘proof’ of time being illusory. We pointed out that none of the equations of physics, from Newton’s laws to ...

A comprehensive developer guide to implementing secure authentication in modern applications. Covers OAuth 2.0, OIDC, ...

Developing gray hair is a normal part of getting older. But not everyone likes how it looks on them. Luckily, recent research has discovered why and how hair starts going gray—and it also may lay the ...