Name: Darwin visits a vanished Native American civilization in Oklahoma @StanEvolve
Uploaded: 2023-07-07T01:29:31-0400
Duration: 8 min 17 s
Description: At Spiro, Oklahoma, there is a little hump of dirt. It was once a big pyramid at one of the most important cities in the Native Mississippian culture, about 800 years ago. It was looted and dynamited in the 1930s.

Darwin and convergent desert evolution @StanEvolve

Uploaded January 2026 | Updated September 2026, 1 week ago

Desert plant adaptations (such as reduced leaf area, spines, etc.) have evolved independently in several evolutionary lineages of plants, including both the cactus and the spurge families. A visit to the botanical garden in Strasbourg, France.

Darwin and plants that look like pebbles

Darwin visits a vanished Native American civilization in Oklahoma