Daniel and Kelly’s Extraordinary Universe How long have we been human? (featuring Dr. Scott Solomon)
48 snips
Nov 25, 2025 AI Snips
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Why Olduvai Gorge Yields So Many Fossils
- Olduvai Gorge preserved fossils because a lake drew animals and volcanic ash buried remains.
- Erosion later exposed those layers so researchers could find abundant fossils on the surface.
Excavate Carefully And Preserve Context
- Excavate slowly and document exact context to preserve information about tools and associations.
- Reserve unexcavated sections for future techniques and questions researchers may ask.
Walking Before Big Brains
- Bipedal walking predates large brains; Australopithecus afarensis walked upright ~3.5 million years ago.
- Brain expansion occurred mostly in the last ~2 million years after upright walking evolved.