Isaac Newton · every age

What was Isaac Newton doing at 53?

Invented calculus and gravity theory in a plague year at 23

1. c. 1696

   Moved to London as Warden of the Royal Mint

   He took the job seriously, recoining the currency and personally pursuing counterfeiters.

   Source: en.wikipedia.org

Portrait: Portrait: Godfrey Kneller (1689), public domain, via Wikimedia Commons · source