Charles Darwin · every age

What was Charles Darwin doing at 23?

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

1. Sep 1832

   Dug up fossil bones of giant extinct mammals in Argentina

   At Punta Alta near Bahía Blanca. Why had they died out while similar animals lived on?

   Source: en.wikipedia.org

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