Charles Darwin · every age

What was Charles Darwin doing at 35?

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

1. Jul 1844

   Wrote his theory out as a 230-page essay

   To be published if he died. In January he had told Hooker the idea, comparing it to confessing a murder.

   Source: en.wikipedia.org

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