Stephen Hawking · every age

What was Stephen Hawking doing at 31?

First book, The Large Scale Structure of Space-Time (1973).

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

c. 1973
First book, The Large Scale Structure of Space-Time
With George Ellis. A technical monograph.
Source: en.wikipedia.org

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Others at 31

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