A pen that fits on your keychain and writes on nearly anything? That’s not a fantasy — it’s the ForeverPen, and it’s available now for just $23.99 (regularly $40). Built from a durable ...

The pen finds early signs of Parkinson’s by studying handwriting. It works without batteries and can be used in regular check ...

Catching Parkinson’s disease early is one of the biggest challenges doctors face. Many people with the condition aren’t ...