Charles Darwin · every age

What was Charles Darwin doing at 40?

Boarded the Beagle at 22, published his big idea at 50

1. c. 1849

   Took the water cure at Dr Gully's spa in Malvern

   Years of vomiting and exhaustion; the cold-water treatment seemed to help.

   Source: en.wikipedia.org

Portrait: Photo: Maull & Fox (c. 1854), public domain, via Wikimedia Commons · source