Stephen Hawking · every age

What was Stephen Hawking doing at 39?

Given two years to live at 21, he worked for 55 more

1. c. 1981

   Argued that information is lost when black holes evaporate

   The information paradox. He fought over it for 30 years and eventually conceded.

   Source: en.wikipedia.org

Portrait: Photo: NASA (StarChild), public domain, via Wikimedia Commons · source