Isaac Newton · every age

What was Isaac Newton doing at 77?

Invented calculus and gravity theory in a plague year at 23

1. c. 1720

   Lost at least £10,000 in the South Sea Bubble

   Possibly more than £20,000; he still died rich.

   Source: en.wikipedia.org

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